CVE-2020-13965

CRITICALNVD 6.19.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2024-06-26), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 6.1 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 77%CVSS: 6.1Exploit: cisa kev · ssvc active · epss top5pct · epss highExposed: 0

A fix is available — apply it.

An issue was discovered in Roundcube Webmail before 1.3.12 and 1.4.x before 1.4.5. There is XSS via a malicious XML attachment because text/xml is among the allowed types for a preview.

CVSS v3
6.1
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
77%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

June 9, 2020

Last Modified

November 4, 2025

Advisory Details (9)

Auto-updated Jun 13, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release.
generic🟡 PoC Available

Disclosures/CVE-2020-13965-Cross Site-Scripting via Malicious XML Attachment-Roundcube at master · DrunkenShells/Disclosures · GitHub

https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-13965-Cross%20Site-Scripting%20via%20Malicious%20XML%20Attachment-Roundcube
generic

[SECURITY] [DSA 4700-1] roundcube security update

https://www.debian.org/security/2020/dsa-4700
generic

Security updates 1.4.5 and 1.3.12 released

https://roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12
generic

[SECURITY] Fedora 32 Update: roundcubemail-1.4.6-1.fc32 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ODPJXBHZ32QSP4MYT2OBCALYXSUJ47SK/
generic

[SECURITY] Fedora 31 Update: roundcubemail-1.4.6-1.fc31 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DLESQ4LPJGMSWHQ4TBRTVQRDG7IXAZCW/
github_release Patch Available

Roundcube Webmail 1.4.5

Patch available: roundcube/roundcubemail 1.4.5

https://github.com/roundcube/roundcubemail/releases/tag/1.4.5
github_release Patch Available

Roundcube Webmail 1.3.12

Patch available: roundcube/roundcubemail 1.3.12

https://github.com/roundcube/roundcubemail/releases/tag/1.3.12
generic

Comparing 1.4.4...1.4.5 · roundcube/roundcubemail · GitHub

https://github.com/roundcube/roundcubemail/compare/1.4.4...1.4.5
github_commit

commit 884eb611627e (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 884eb611627e — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/884eb611627ef2bd5a2e20e02009ebb1eceecdc3

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubunturoundcube-sqlite3 (1.2~beta+dfsg.1-0ubuntu1+esm2) @ xenial2026-07-27ubuntu

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.

Weakness Classification(2)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 42× in last 7d / 287× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 602 total refreshes for this CVE.

  1. 2026-07-27 14:52 UTCGHSA enrichment
  2. 2026-07-27 09:14 UTCVendor advisory
  3. 2026-07-27 09:14 UTCGHSA enrichment
  4. 2026-07-27 04:50 UTCGHSA enrichment
  5. 2026-07-27 00:26 UTCGHSA enrichment
  6. 2026-07-26 19:59 UTCGHSA enrichment
  7. 2026-07-26 15:35 UTCEG score recompute
  8. 2026-07-26 15:35 UTCVendor advisory
  9. 2026-07-26 15:35 UTCGHSA enrichment
  10. 2026-07-26 14:51 UTCEPSS rescore
  11. 2026-07-26 11:09 UTCEG score recompute
  12. 2026-07-26 11:09 UTCGHSA enrichment
  13. 2026-07-26 06:43 UTCVendor advisory
  14. 2026-07-26 06:43 UTCGHSA enrichment
  15. 2026-07-26 02:17 UTCEG score recompute
  16. 2026-07-26 02:17 UTCVendor advisory
  17. 2026-07-26 02:17 UTCGHSA enrichment
  18. 2026-07-24 14:14 UTCEPSS rescore
  19. 2026-07-23 01:49 UTCEG score recompute
  20. 2026-07-22 22:24 UTCEG score recompute
  21. 2026-07-22 22:24 UTCVendor advisory
  22. 2026-07-22 22:23 UTCGHSA enrichment
  23. 2026-07-22 19:40 UTCCISA KEV update
  24. 2026-07-22 17:58 UTCEG score recompute
  25. 2026-07-22 17:58 UTCGHSA enrichment
Show 75 more
  1. 2026-07-22 14:05 UTCEPSS rescore
  2. 2026-07-22 13:31 UTCGHSA enrichment
  3. 2026-07-22 09:07 UTCGHSA enrichment
  4. 2026-07-22 04:43 UTCGHSA enrichment
  5. 2026-07-22 00:17 UTCGHSA enrichment
  6. 2026-07-21 18:33 UTCGHSA enrichment
  7. 2026-07-21 14:37 UTCCISA KEV update
  8. 2026-07-21 14:08 UTCGHSA enrichment
  9. 2026-07-21 09:44 UTCGHSA enrichment
  10. 2026-07-21 05:19 UTCGHSA enrichment
  11. 2026-07-21 00:53 UTCVendor advisory
  12. 2026-07-21 00:53 UTCGHSA enrichment
  13. 2026-07-20 20:29 UTCEG score recompute
  14. 2026-07-20 20:29 UTCVendor advisory
  15. 2026-07-20 20:29 UTCGHSA enrichment
  16. 2026-07-20 17:04 UTCEPSS rescore
  17. 2026-07-20 16:05 UTCGHSA enrichment
  18. 2026-07-20 11:39 UTCVendor advisory
  19. 2026-07-20 11:39 UTCGHSA enrichment
  20. 2026-07-20 07:15 UTCVendor advisory
  21. 2026-07-20 07:15 UTCGHSA enrichment
  22. 2026-07-20 02:52 UTCVendor advisory
  23. 2026-07-20 02:52 UTCGHSA enrichment
  24. 2026-07-19 22:27 UTCVendor advisory
  25. 2026-07-19 22:27 UTCGHSA enrichment
  26. 2026-07-19 18:04 UTCEG score recompute
  27. 2026-07-19 18:04 UTCVendor advisory
  28. 2026-07-19 18:04 UTCGHSA enrichment
  29. 2026-07-19 14:28 UTCEPSS rescore
  30. 2026-07-19 14:28 UTCEPSS rescore
  31. 2026-07-19 13:39 UTCVendor advisory
  32. 2026-07-19 13:39 UTCGHSA enrichment
  33. 2026-07-19 09:15 UTCVendor advisory
  34. 2026-07-19 09:15 UTCGHSA enrichment
  35. 2026-07-19 04:50 UTCVendor advisory
  36. 2026-07-19 04:50 UTCGHSA enrichment
  37. 2026-07-19 00:26 UTCVendor advisory
  38. 2026-07-19 00:26 UTCGHSA enrichment
  39. 2026-07-18 20:02 UTCVendor advisory
  40. 2026-07-18 20:02 UTCGHSA enrichment
  41. 2026-07-18 15:37 UTCVendor advisory
  42. 2026-07-18 15:37 UTCGHSA enrichment
  43. 2026-07-18 11:13 UTCVendor advisory
  44. 2026-07-18 11:13 UTCGHSA enrichment
  45. 2026-07-18 06:49 UTCVendor advisory
  46. 2026-07-18 06:49 UTCGHSA enrichment
  47. 2026-07-18 02:25 UTCVendor advisory
  48. 2026-07-18 02:25 UTCGHSA enrichment
  49. 2026-07-17 22:01 UTCVendor advisory
  50. 2026-07-17 22:01 UTCGHSA enrichment
  51. 2026-07-17 17:37 UTCGHSA enrichment
  52. 2026-07-17 13:13 UTCGHSA enrichment
  53. 2026-07-17 08:48 UTCEG score recompute
  54. 2026-07-17 08:48 UTCGHSA enrichment
  55. 2026-07-17 04:24 UTCGHSA enrichment
  56. 2026-07-17 00:00 UTCVendor advisory
  57. 2026-07-17 00:00 UTCGHSA enrichment
  58. 2026-07-16 19:36 UTCVendor advisory
  59. 2026-07-16 19:36 UTCGHSA enrichment
  60. 2026-07-16 17:04 UTCCISA KEV update
  61. 2026-07-16 15:11 UTCGHSA enrichment
  62. 2026-07-16 10:47 UTCVendor advisory
  63. 2026-07-16 10:46 UTCGHSA enrichment
  64. 2026-07-16 06:22 UTCGHSA enrichment
  65. 2026-07-16 01:58 UTCVendor advisory
  66. 2026-07-16 01:58 UTCGHSA enrichment
  67. 2026-07-15 21:34 UTCVendor advisory
  68. 2026-07-15 21:34 UTCGHSA enrichment
  69. 2026-07-15 17:10 UTCGHSA enrichment
  70. 2026-07-15 16:55 UTCEPSS rescore
  71. 2026-07-15 16:49 UTCCISA KEV update
  72. 2026-07-15 15:04 UTCCISA KEV update
  73. 2026-07-15 12:46 UTCGHSA enrichment
  74. 2026-07-15 08:21 UTCGHSA enrichment
  75. 2026-07-15 03:57 UTCVendor advisory

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2020-13965?
CVE-2020-13965 is a critical vulnerability published on June 9, 2020. An issue was discovered in Roundcube Webmail before 1.3.12 and 1.4.x before 1.4.5. There is XSS via a malicious XML attachment because text/xml is among the allowed types for a preview.
When was CVE-2020-13965 disclosed?
CVE-2020-13965 was first published in the National Vulnerability Database on June 9, 2020, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-13965 actively exploited?
Yes. CISA added CVE-2020-13965 to the Known Exploited Vulnerabilities catalog on June 26, 2024, affecting Roundcube Webmail. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-13965?
CVE-2020-13965 has a CVSS v3 base score of 6.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2020-13965?
CVE-2020-13965 affects Roundcube Webmail. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2020-13965?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-13965, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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