CVE-2023-5631

CRITICALNVD 5.49.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-10-26), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 5.4 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: 76%CVSS: 5.4Exploit: cisa kev · ssvc active · epss top5pct · epss highExposed: 0

A fix is available — apply it.

Roundcube before 1.4.15, 1.5.x before 1.5.5, and 1.6.x before 1.6.4 allows stored XSS via an HTML e-mail message with a crafted SVG document because of program/lib/Roundcube/rcube_washtml.php behavior. This could allow a remote attacker

to load arbitrary JavaScript code.

CVSS v3
5.4
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
76%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

October 18, 2023

Last Modified

June 17, 2026

Advisory Details (10)

Auto-updated Jun 13, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: github_commit, github_release.
github_release Patch Available

Roundcube Webmail 1.6.4

Patch available: roundcube/roundcubemail 1.6.4

https://github.com/roundcube/roundcubemail/releases/tag/1.6.4
github_release Patch Available

Roundcube Webmail 1.5.5

Patch available: roundcube/roundcubemail 1.5.5

https://github.com/roundcube/roundcubemail/releases/tag/1.5.5
github_release Patch Available

Roundcube Webmail 1.4.15

Patch available: roundcube/roundcubemail 1.4.15

https://github.com/roundcube/roundcubemail/releases/tag/1.4.15
generic

XSS with svg use tag on RC 1.5.3 · Issue #9168 · roundcube/roundcubemail · GitHub

https://github.com/roundcube/roundcubemail/issues/9168
github_commit

commit 6ee6e7ae301e (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 6ee6e7ae301e — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/6ee6e7ae301e165e2b2cb703edf75552e5376613
github_commit

commit 41756cc3331b (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 41756cc3331b — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/41756cc3331b495cc0b71886984474dc529dd31d
generic Patch Available

#1054079 - roundcube: CVE-2023-5631: cross-site scripting (XSS) vulnerability in handling of SVG in HTML messages - Debian Bug report logs

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1054079
generic🔴 Active Exploitation

oss-security - CVE-2023-37580 (and others): XSS vulnerabilities in Zimbra Collaboration Suite

http://www.openwall.com/lists/oss-security/2023/11/17/2
generic🔴 Active Exploitation

oss-security - Re: CVE-2023-5631: XSS vulnerability in Roundcube webmail

http://www.openwall.com/lists/oss-security/2023/11/01/3
generic🔴 Active Exploitation

oss-security - CVE-2023-5631: XSS vulnerability in Roundcube webmail

http://www.openwall.com/lists/oss-security/2023/11/01/1

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubunturoundcube-sqlite3 (1.2~beta+dfsg.1-0ubuntu1+esm4) @ xenial2026-08-05ubuntu

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

(5 across 5 ecosystems)
Debian:10(1)
PackageVulnerable rangeFixed inDependents
roundcube1.3.10+dfsg.1-1 ... 1.3.8+dfsg.1-2 (11 versions)1.3.17+dfsg.1-1~deb10u4—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
roundcube1.4.11+dfsg.1-4 ... 1.4.15+dfsg.1-1~deb11u1~bpo10+1 (8 versions)1.4.15+dfsg.1-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
roundcube1.6.1+dfsg-1, 1.6.2+dfsg-1, 1.6.3+dfsg-1, 1.6.3+dfsg-1~deb12u1, 1.6.3+dfsg-21.6.4+dfsg-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
roundcube—1.6.4+dfsg-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
roundcube—1.6.4+dfsg-1—

Weakness Classification(1)

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 84× in last 7d / 295× 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 765 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2023-5631?
CVE-2023-5631 is a critical vulnerability published on October 18, 2023. Roundcube before 1.4.15, 1.5.x before 1.5.5, and 1.6.x before 1.6.4 allows stored XSS via an HTML e-mail message with a crafted SVG document because of program/lib/Roundcube/rcube_washtml.php behavior. This could allow a remote attacker to load arbitrary JavaScript code.
When was CVE-2023-5631 disclosed?
CVE-2023-5631 was first published in the National Vulnerability Database on October 18, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-5631 actively exploited?
Yes. CISA added CVE-2023-5631 to the Known Exploited Vulnerabilities catalog on October 26, 2023, affecting Roundcube Webmail. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-5631?
CVE-2023-5631 has a CVSS v3 base score of 5.4 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2023-5631?
CVE-2023-5631 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-2023-5631?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-5631, 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

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