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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 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
—
EPSS
64.8%
KEV
Not listed

Published

March 31, 2023

Last Modified

February 18, 2025

Advisory Details (6)

Auto-updated Jun 2, 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

(1 across 1 ecosystem)
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 13× in last 7d / 49× 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 105 total refreshes for this CVE.

  1. 2026-07-22 23:09 UTCEG score recompute
  2. 2026-07-22 14:06 UTCEPSS rescore
  3. 2026-07-22 14:06 UTCEPSS rescore
  4. 2026-07-21 15:23 UTCEPSS rescore
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  6. 2026-07-19 14:29 UTCEPSS rescore
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  12. 2026-07-16 17:01 UTCEPSS rescore
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  14. 2026-07-16 01:19 UTCOSV refresh
  15. 2026-07-15 16:56 UTCEPSS rescore
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  17. 2026-07-15 01:58 UTCEPSS rescore
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  24. 2026-07-11 08:25 UTCEPSS rescore
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  1. 2026-07-09 19:08 UTCEPSS rescore
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  3. 2026-07-08 15:13 UTCEPSS rescore
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  5. 2026-07-06 16:26 UTCEPSS rescore
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  7. 2026-07-05 02:28 UTCEPSS rescore
  8. 2026-07-04 06:29 UTCEPSS rescore
  9. 2026-07-02 16:59 UTCEPSS rescore
  10. 2026-07-01 15:04 UTCEPSS rescore
  11. 2026-06-30 23:21 UTCEPSS rescore
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  17. 2026-06-28 01:34 UTCOSV refresh
  18. 2026-06-27 03:07 UTCEPSS rescore
  19. 2026-06-25 13:48 UTCEPSS rescore
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  21. 2026-06-24 14:03 UTCEPSS rescore
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  23. 2026-06-23 21:31 UTCEPSS rescore
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  25. 2026-06-22 14:24 UTCEPSS rescore
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  27. 2026-06-21 14:55 UTCEPSS rescore
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  29. 2026-06-21 01:58 UTCEPSS rescore
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  31. 2026-06-19 19:24 UTCEPSS rescore
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  39. 2026-06-15 17:47 UTCEPSS rescore
  40. 2026-06-14 23:16 UTCEPSS rescore
  41. 2026-06-13 22:59 UTCEPSS rescore
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  43. 2026-06-12 23:10 UTCEPSS rescore
  44. 2026-06-11 13:59 UTCEPSS rescore
  45. 2026-06-10 22:17 UTCEPSS rescore
  46. 2026-06-10 13:21 UTCEPSS rescore
  47. 2026-06-10 13:21 UTCEPSS rescore
  48. 2026-06-10 12:17 UTCOSV refresh
  49. 2026-06-08 14:15 UTCEPSS rescore
  50. 2026-06-08 14:15 UTCEPSS rescore
  51. 2026-06-07 15:23 UTCEPSS rescore
  52. 2026-06-07 15:23 UTCEPSS rescore
  53. 2026-06-06 13:46 UTCEPSS rescore
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  55. 2026-06-05 22:46 UTCEPSS rescore
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  57. 2026-06-05 06:09 UTCEPSS rescore
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  59. 2026-06-04 13:11 UTCEPSS rescore
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  64. 2026-06-01 13:51 UTCEPSS rescore
  65. 2026-05-31 22:29 UTCEPSS rescore
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  70. 2026-05-29 13:43 UTCEPSS rescore
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  73. 2026-05-27 13:39 UTCEPSS rescore
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  75. 2026-05-26 13:43 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 64.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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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