CVE-2023-29141

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.2%, top 35% of all CVEs by exploit prediction. 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
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

An issue was discovered in MediaWiki before 1.35.10, 1.36.x through 1.38.x before 1.38.6, and 1.39.x before 1.39.3. An auto-block can occur for an untrusted X-Forwarded-For header.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
66%
KEV
Not listed

Published

March 31, 2023

Last Modified

February 18, 2025

Advisory Details (6)

Auto-updated Sep 3, 2026
⚠️ Active exploitation confirmed. Patch available.
generic

[SECURITY] Fedora 37 Update: mediawiki-1.38.6-1.fc37 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZGK4NZPIJ5ET2ANRZOUYPCRIB5I64JR7/
generic

[SECURITY] Fedora 38 Update: mediawiki-1.39.3-1.fc38 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ONWHGOBFD6CQAEGOP5O375XAP2N6RUHT/
generic Patch Available

[SECURITY] [DLA 3540-1] mediawiki security update

https://lists.debian.org/debian-lts-announce/2023/08/msg00029.html
generic

RELEASE-NOTES-1.39 - mediawiki/core - Gitiles

https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_39/RELEASE-NOTES-1.39
generic

[SECURITY] [DSA 5447-1] mediawiki security update

https://www.debian.org/security/2023/dsa-5447
generic🔴 Active Exploitation

⚓ T285159 CVE-2023-29141: X-Forwarded-For header allows brute-forcing autoblocked IP addresses

https://phabricator.wikimedia.org/T285159

Affected Packages

(6 across 6 ecosystems)
Debian:10(1)
PackageVulnerable rangeFixed inDependents
mediawiki1:1.31.10-1~deb10u1 ... 1:1.31.8-1 (19 versions)1:1.31.16-1+deb10u6—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
mediawiki1:1.35.2-1 ... 1:1.35.8-1~deb11u1 (12 versions)1:1.35.11-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
mediawiki1:1.39.2-11:1.39.4-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
mediawiki—1:1.39.4-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
mediawiki—1:1.39.4-1—
Packagist(1)
PackageVulnerable rangeFixed inDependents
mediawiki/core1.20.3 ... 1.35.9 (126 versions)1.35.10—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 29× 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 161 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2023-29141?
CVE-2023-29141 is a critical vulnerability published on March 31, 2023. An issue was discovered in MediaWiki before 1.35.10, 1.36.x through 1.38.x before 1.38.6, and 1.39.x before 1.39.3. An auto-block can occur for an untrusted X-Forwarded-For header.
When was CVE-2023-29141 disclosed?
CVE-2023-29141 was first published in the National Vulnerability Database on March 31, 2023, with the most recent update on February 18, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-29141 actively exploited?
CVE-2023-29141 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 34.0% of all scored CVEs.
What is the CVSS score of CVE-2023-29141?
CVE-2023-29141 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-29141?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-29141, 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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