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 43× in last 7d / 288× 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 601 total refreshes for this CVE.

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

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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2020-13965

Explore →

Is Your Infrastructure Affected by CVE-2020-13965?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs