CVE-2023-35156

CRITICALNVD 9.69.6
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2023-06-22. NVD baseline CVSS 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated

Also known asEUVD-2023-1742 (ENISA EUVD) · GHSA-834c-x29c-f42c (GitHub Security Advisories)Source: ENISA EUVD

9.6EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 2.1%CVSS: 9.6Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Users are able to forge an URL with a payload allowing to inject Javascript in the page (XSS). It's possible to exploit the delete template to perform a XSS, e.g. by using URL such as: > xwiki/bin/get/FlamingoThemes/Cerulean?xpage=xpart&vm=delete.vm&xredirect=javascript:alert(document.domain). This vulnerability exists since XWiki 6.0-rc-1. The vulnerability has been patched in XWiki 14.10.6 and 15.1. Note that a partial patch has been provided in 14.10.5 but wasn't enough to entirely fix the vulnerability.

CVSS v3
9.6
EG Score
9.6CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity96% × 45%
Impact severity (EG Severity): CVSS 9.6 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
2.1%
EPSS %ILE
81st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.6): severity, escalated by confirmed exploitation. This CVE's 9.6 is its impact severity (EG Severity), not escalated.

EG Severity
9.6 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
2.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-11). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

June 23, 2023

Last Modified

November 21, 2024

Advisory Details (7)

Auto-updated Oct 2, 2026
Patch available. Sources: github_commit, github.
GitHub commit Patch Available

commit e80d22d193df (xwiki/xwiki-platform)

Patch available: xwiki/xwiki-platform xwiki-platform-18.2.0 (contains commit e80d22d193df)

https://github.com/xwiki/xwiki-platform/commit/e80d22d193df364b07bab7925572720f91a8984a
GitHub commit Patch Available

commit 24ec12890ac7 (xwiki/xwiki-platform)

Patch available: xwiki/xwiki-platform xwiki-platform-18.2.0 (contains commit 24ec12890ac7)

https://github.com/xwiki/xwiki-platform/commit/24ec12890ac7fa6daec8d0b3435cfcba11362fd5
GitHub commit Patch Available

commit 13875a6437d4 (xwiki/xwiki-platform)

Patch available: xwiki/xwiki-platform xwiki-platform-18.2.0 (contains commit 13875a6437d4)

https://github.com/xwiki/xwiki-platform/commit/13875a6437d4525ac4aeea25918f2d2dffac9ee1
Web page

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https://jira.xwiki.org/browse/XWIKI-20672
Web page

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https://jira.xwiki.org/browse/XWIKI-20583
Web page

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https://jira.xwiki.org/browse/XWIKI-20341
GitHub advisoryMentions a patch (unverified)

RXSS via xredirect parameter in delete template · Advisory · xwiki/xwiki-platform · GitHub

https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-834c-x29c-f42c

Vendor Advisories for CVE-2023-35156(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
mavenorg.xwiki.platform:xwiki-platform-flamingo-skin-resources @ 14.10.6 (fixes >= 6.0-rc-1, < 14.10.6)—ghsa
mavenorg.xwiki.platform:xwiki-platform-flamingo-skin-resources @ 15.1 (fixes >= 15.0-rc-0, < 15.1)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
org.xwiki.platform:xwiki-platform-flamingo-skin-resources—
  • 6.0-rc-1 up to 14.10.6: fixed in 14.10.6
  • 15.0-rc-0 up to 15.1: fixed in 15.1
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 42× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 262 rows on record for this CVE, as 99 entries (1 repeat merged).

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 162 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:44 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  2. 2026-11-12 16:30 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  3. 2026-11-12 16:02 UTCEchelonGraph re-scored
  4. 2026-11-12 16:02 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
  5. 2026-11-11 16:33 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  6. 2026-11-11 15:37 UTCEchelonGraph re-scored
  7. 2026-11-11 15:37 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
  8. 2026-11-10 16:37 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  9. 2026-11-10 15:13 UTCEchelonGraph re-scored
  10. 2026-11-10 15:13 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
  11. 2026-11-09 16:30 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  12. 2026-11-09 14:49 UTCEchelonGraph re-scored
  13. 2026-11-09 14:49 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
  14. 2026-11-08 16:34 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  15. 2026-11-08 14:25 UTCEchelonGraph re-scored
  16. 2026-11-08 14:25 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
  17. 2026-11-07 16:35 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  18. 2026-11-07 14:01 UTCEchelonGraph re-scored
  19. 2026-11-07 14:01 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
  20. 2026-11-06 16:31 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  21. 2026-11-06 13:37 UTCEchelonGraph re-scored
  22. 2026-11-06 13:37 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
  23. 2026-11-05 16:33 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  24. 2026-11-05 13:13 UTCEchelonGraph re-scored
  25. 2026-11-05 13:13 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
Show 74 more
  1. 2026-11-04 16:31 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  2. 2026-11-04 13:55 UTCOSV refresh
  3. 2026-11-04 12:47 UTCEchelonGraph re-scored
  4. 2026-11-04 12:47 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
  5. 2026-11-03 16:40 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  6. 2026-11-03 12:23 UTCEchelonGraph re-scored
  7. 2026-11-03 12:23 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
  8. 2026-11-02 16:39 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  9. 2026-11-02 11:59 UTCEchelonGraph re-scored
  10. 2026-11-02 11:59 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
  11. 2026-11-01 11:36 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
  12. 2026-11-01 08:20 UTCGHSA enrichmentGHSA-834c-x29c-f42c · GitHub severity CRITICAL · GitHub CVSS 9.6
  13. 2026-11-01 08:20 UTCEchelonGraph re-scored
  14. 2026-10-31 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  15. 2026-10-31 11:12 UTCEchelonGraph re-scored
  16. 2026-10-30 16:31 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  17. 2026-10-30 10:48 UTCEchelonGraph re-scored
  18. 2026-10-29 16:30 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  19. 2026-10-29 10:24 UTCEchelonGraph re-scored
  20. 2026-10-28 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  21. 2026-10-28 10:00 UTCEchelonGraph re-scored
  22. 2026-10-27 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  23. 2026-10-27 08:42 UTCEchelonGraph re-scored
  24. 2026-10-25 17:40 UTCEchelonGraph re-scored
  25. 2026-10-25 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  26. 2026-10-25 05:56 UTCEchelonGraph re-scored
  27. 2026-10-24 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  28. 2026-10-24 05:32 UTCEchelonGraph re-scored
  29. 2026-10-23 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  30. 2026-10-23 05:08 UTCEchelonGraph re-scored
  31. 2026-10-22 16:31 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  32. 2026-10-22 04:40 UTCEchelonGraph re-scored
  33. 2026-10-21 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  34. 2026-10-21 04:12 UTCEchelonGraph re-scored
  35. 2026-10-20 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  36. 2026-10-20 03:43 UTCEchelonGraph re-scored
  37. 2026-10-19 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  38. 2026-10-19 03:18 UTCEchelonGraph re-scored
  39. 2026-10-18 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  40. 2026-10-18 07:58 UTCEchelonGraph re-scored
  41. 2026-10-18 02:52 UTCEchelonGraph re-scored
  42. 2026-10-17 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  43. 2026-10-17 02:28 UTCEchelonGraph re-scored
  44. 2026-10-16 16:35 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  45. 2026-10-16 02:01 UTCEchelonGraph re-scored
  46. 2026-10-15 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  47. 2026-10-14 21:46 UTCEchelonGraph re-scored
  48. 2026-10-14 16:29 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  49. 2026-10-13 17:35 UTCEchelonGraph re-scored
  50. 2026-10-13 16:30 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  51. 2026-10-12 17:03 UTCEchelonGraph re-scored
  52. 2026-10-12 16:30 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  53. 2026-10-11 21:50 UTCEchelonGraph re-scored
  54. 2026-10-11 13:45 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  55. 2026-10-10 19:57 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  56. 2026-10-09 20:05 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  57. 2026-10-08 17:06 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  58. 2026-10-07 23:46 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  59. 2026-10-06 15:15 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  60. 2026-10-05 17:41 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  61. 2026-10-04 23:20 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  62. 2026-10-03 14:23 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  63. 2026-09-30 16:25 UTCEchelonGraph re-scored
  64. 2026-09-30 15:01 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  65. 2026-09-29 15:16 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  66. 2026-09-28 13:49 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  67. 2026-09-27 13:42 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  68. 2026-09-26 15:55 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  69. 2026-09-26 00:22 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  70. 2026-09-24 14:01 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  71. 2026-09-23 13:45 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  72. 2026-09-23 08:53 UTCOSV refresh
  73. 2026-09-22 14:45 UTCEPSS rescoreEPSS 2.1% · 80th percentile
  74. 2026-09-16 14:05 UTCEPSS rescoreEPSS 2.1% · 80th percentile

Public detection templates

(1 reference)

A public Nuclei detection template is referenced for this CVE. A detection template checks whether a system is affected; it is not necessarily exploit code.

  • Nucleihttp/cves/2023/CVE-2023-35156.yaml
    Published Jul 4, 2024

    XWiki >= 6.0-rc-1 - Cross-Site Scripting

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2023-35156?
CVE-2023-35156 is a critical-severity vulnerability; its CVE record was published on June 23, 2023. XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Users are able to forge an URL with a payload allowing to inject Javascript in the page (XSS). It's possible to exploit the delete template to perform a XSS, e.g. by using URL such as: >…
When was the CVE record for CVE-2023-35156 published?
The CVE record for CVE-2023-35156 was published on June 23, 2023. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2023-35156 actively exploited?
CVE-2023-35156 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.1% probability of exploitation in the next 30 days (81st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-35156?
CVE-2023-35156 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2023-35156?
A fix for CVE-2023-35156 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2023-35156 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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