CVE-2023-28427

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 1.2% (66th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.2%CVSS: 8.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript. In versions prior to 24.0.0 events sent with special strings in key places can temporarily disrupt or impede the matrix-js-sdk from functioning properly, potentially impacting the consumer's ability to process data safely. Note that the matrix-js-sdk can appear to be operating normally but be excluding or corrupting runtime data presented to the consumer. This vulnerability is distinct from GHSA-rfv9-x7hh-xc32 which covers a similar issue. The issue has been patched in matrix-js-sdk 24.0.0 and users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
52
EG Risk 52/100CISA SSVC

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
Severity82% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
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
1.2%
EPSS %ILE
66th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

March 28, 2023

Last Modified

November 21, 2024

Advisory Details (5)

Auto-updated Sep 8, 2026
Patch available. Sources: github.
generic

[SECURITY] [DSA 5392-1] thunderbird security update

https://www.debian.org/security/2023/dsa-5392
generic

Mozilla Thunderbird: Multiple Vulnerabilities (GLSA 202305-36) — Gentoo security

https://security.gentoo.org/glsa/202305-36
generic

Matrix.org - Security releases: matrix-js-sdk 24.0.0 and matrix-react-sdk 3.69.0

https://matrix.org/blog/2023/03/28/security-releases-matrix-js-sdk-24-0-0-and-matrix-react-sdk-3-69-0
genericMentions a patch (unverified)

[SECURITY] [DLA 3400-1] thunderbird security update

https://lists.debian.org/debian-lts-announce/2023/04/msg00027.html
githubMentions a patch (unverified)

Prototype pollution in matrix-js-sdk (part 2) · Advisory · matrix-org/matrix-js-sdk · GitHub

https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-mwq8-fjpf-c2gr

Patch Availability(8)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatthunderbird-0:102.10.0-2.el8_42023-04-17redhat
redhatthunderbird-0:102.10.0-2.el8_62023-04-17redhat
redhatthunderbird-0:102.10.0-2.el9_12023-04-17redhat
redhatthunderbird-0:102.10.0-2.el9_02023-04-17redhat
redhatthunderbird-0:102.10.0-2.el7_92023-04-17redhat
redhatthunderbird-0:102.10.0-2.el8_72023-04-17redhat
redhatthunderbird-0:102.10.0-2.el8_12023-04-17redhat
redhatthunderbird-0:102.10.0-2.el8_22023-04-17redhat

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

(7 across 6 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
node-matrix-js-sdk9.11.0+~cs9.9.16-1, 9.11.0+~cs9.9.16-2, 9.3.0+~cs9.9.16-2, 9.7.0~~rc1+~cs9.9.16-1, 9.7.0~~rc1+~cs9.9.16-2
  • every version on: no fix on record
—
thunderbird1:102.0.1-1 ... 1:91.9.0-1~deb9u1 (112 versions)
  • every version up to 1:102.10.0-1~deb11u1: fixed in 1:102.10.0-1~deb11u1
—
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
thunderbird1:102.0.1-1 ... 1:91.9.0-1~deb9u1 (235 versions)
  • every version up to 1:102.10.0-1~deb10u1: fixed in 1:102.10.0-1~deb10u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
thunderbird—
  • every version up to 1:102.9.1-1: fixed in 1:102.9.1-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
thunderbird—
  • every version up to 1:102.9.1-1: fixed in 1:102.9.1-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
thunderbird—
  • every version up to 1:102.9.1-1: fixed in 1:102.9.1-1
—
npm(1)
PackageVulnerable rangeFix by version rangeDependents
matrix-js-sdk—
  • every version up to 24.0.0: fixed in 24.0.0
—

Weakness Classification(1)

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

All Vendor Advisories

(8)

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 6× in last 7d / 25× 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 185 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2023-28427?
CVE-2023-28427 is a high vulnerability published on March 28, 2023. matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript. In versions prior to 24.0.0 events sent with special strings in key places can temporarily disrupt or impede the matrix-js-sdk from functioning properly, potentially impacting the consumer's ability to process data…
When was CVE-2023-28427 disclosed?
CVE-2023-28427 was first published on March 28, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-28427 actively exploited?
CVE-2023-28427 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.2% probability of exploitation in the next 30 days (66th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-28427?
CVE-2023-28427 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2023-28427?
A fix for CVE-2023-28427 is available: update to the fixed version the vendor names in its advisory.

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