CVE-2024-23176

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 5.4 from GitHub Security Advisory published 2026-09-14. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated
5.4EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.4Exploit: No code on recordExposed services: Not assessed

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

The CVE record's CNA (MITRE Corporation) lists MediaWiki MassMessage versions before 1.40.2 as affected. No release containing a fix is confirmed on record.

An issue was discovered in the MassMessage extension in MediaWiki before 1.40.2. For a Special:MassMessage?uselang=x-xss URL, the i18n key massmessage-form-page-help allows XSS.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

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 (value × EchelonGraph’s weight)
Severity54% × 45%
The EG Score, 5.4 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
10th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 14, 2026

Last Modified

September 28, 2026

Advisory Details (2)

Auto-updated Sep 14, 2026
No fix on record yet.
Web page

⚓ T347742 CVE-2024-23176: MassMessage i18n key massmessage-form-page-help allows i18n-xss

https://phabricator.wikimedia.org/T347742
Web page

[MediaWiki-announce] Security and maintenance release: 1.35.14 / 1.39.6 / 1.40.2 - MediaWiki-announce - lists.wikimedia.org

https://lists.wikimedia.org/hyperkitty/list/[email protected]/message/TDBUBCCOQJUT4SCHJNPHKQNPBUUETY52/

Vendor Advisories for CVE-2024-23176(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 78× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 82 is merged into the row it repeats.

  1. 2026-10-14 09:35 UTCEG score recompute
  2. 2026-10-14 09:34 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  3. 2026-10-13 16:30 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  4. 2026-10-12 18:02 UTCEG score recompute
  5. 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  6. 2026-10-11 21:27 UTCEG score recompute
  7. 2026-10-11 16:20 UTCEG score recompute
  8. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  9. 2026-10-11 06:14 UTCEG score recompute
  10. 2026-10-11 06:13 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  11. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  12. 2026-10-10 01:35 UTCEG score recompute
  13. 2026-10-10 01:34 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  14. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  15. 2026-10-08 23:04 UTCEG score recompute
  16. 2026-10-08 23:04 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  17. 2026-10-08 17:07 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  18. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  19. 2026-10-07 10:23 UTCEG score recompute
  20. 2026-10-07 10:23 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  21. 2026-10-06 15:15 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  22. 2026-10-06 07:57 UTCEG score recompute
  23. 2026-10-06 07:56 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  24. 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  25. 2026-10-05 05:35 UTCEG score recompute
Show 56 more
  1. 2026-10-05 05:35 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  2. 2026-10-04 23:20 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  3. 2026-10-04 03:12 UTCEG score recompute
  4. 2026-10-04 03:12 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  5. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  6. 2026-10-03 00:50 UTCEG score recompute
  7. 2026-10-03 00:50 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  8. 2026-10-01 22:27 UTCEG score recompute
  9. 2026-10-01 22:27 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  10. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  11. 2026-09-30 19:27 UTCEG score recompute
  12. 2026-09-30 19:27 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  13. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  14. 2026-09-29 17:03 UTCEG score recompute
  15. 2026-09-29 17:03 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  16. 2026-09-29 15:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  17. 2026-09-28 14:27 UTCEG score recompute
  18. 2026-09-28 14:27 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  19. 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  20. 2026-09-27 19:46 UTCEG score recompute
  21. 2026-09-27 19:46 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  22. 2026-09-26 17:23 UTCEG score recompute
  23. 2026-09-26 17:23 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  24. 2026-09-25 15:00 UTCEG score recompute
  25. 2026-09-25 15:00 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  26. 2026-09-24 14:01 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  27. 2026-09-24 12:37 UTCEG score recompute
  28. 2026-09-24 12:37 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  29. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  30. 2026-09-23 10:14 UTCEG score recompute
  31. 2026-09-23 10:14 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  32. 2026-09-22 07:51 UTCEG score recompute
  33. 2026-09-22 07:51 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  34. 2026-09-21 05:29 UTCEG score recompute
  35. 2026-09-21 05:29 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  36. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  37. 2026-09-20 03:07 UTCEG score recompute
  38. 2026-09-20 03:07 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  39. 2026-09-19 00:43 UTCEG score recompute
  40. 2026-09-19 00:43 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  41. 2026-09-17 22:20 UTCEG score recompute
  42. 2026-09-17 22:20 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  43. 2026-09-16 19:58 UTCEG score recompute
  44. 2026-09-16 19:58 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  45. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  46. 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  47. 2026-09-15 18:47 UTCEG score recompute
  48. 2026-09-15 18:47 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  49. 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  50. 2026-09-14 16:25 UTCEG score recompute
  51. 2026-09-14 16:25 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  52. 2026-09-14 15:35 UTCEG score recompute
  53. 2026-09-14 15:35 UTCGHSA enrichmentGHSA-xxr5-62f3-4fpr · GitHub CVSS 5.4
  54. 2026-09-14 07:21 UTCEG score recompute
  55. 2026-09-14 06:55 UTCEG score recomputeFirst assessed: 5.4 MEDIUM
  56. 2026-09-14 06:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2024-23176?
CVE-2024-23176 is a medium-severity vulnerability; its CVE record was published on September 14, 2026. An issue was discovered in the MassMessage extension in MediaWiki before 1.40.2. For a Special:MassMessage?uselang=x-xss URL, the i18n key massmessage-form-page-help allows XSS.
When was the CVE record for CVE-2024-23176 published?
The CVE record for CVE-2024-23176 was published on September 14, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 28, 2026; the record at its source may have been updated since.
Is CVE-2024-23176 actively exploited?
CVE-2024-23176 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-23176?
CVE-2024-23176 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2024-23176?
No fix for CVE-2024-23176 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's CNA (MITRE Corporation) lists MediaWiki MassMessage versions before 1.40.2 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2024-23176 are linked in the Vendor Advisories panel on this page.

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