CVE-2026-12954

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-18. A secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.8Exploit: None knownExposed services: Not assessed

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

The Mapster WP Maps plugin for WordPress is vulnerable to Arbitrary User Meta Write in all versions up to, and including, 1.23.0 via the my_profile_update() function. This is due to the function performing no nonce verification, no capability check, and no allowlist validation on the meta key supplied via the acf-photo-gallery-groups POST parameter before passing both the meta key and its corresponding value directly to update_user_meta(). This makes it possible for authenticated attackers, with Subscriber-level access and above, to update arbitrary user meta values, though privilege escalation is not possible.

CVSS v3
8.8
EG Score
8.8HIGHhigh confidence
EG Risk
40
EG Risk 40/100CISA 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
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
0.5%
EPSS %ILE
37th
KEV
Not listed

CISA SSVCTrack 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 none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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

September 18, 2026

Last Modified

September 19, 2026

References (6)

Vendor Advisories for CVE-2026-12954(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 25× in last 7d / 63× 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.

  1. 2026-10-04 05:03 UTCGHSA enrichment
  2. 2026-10-03 16:35 UTCEG score recompute
  3. 2026-10-03 16:35 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 04:07 UTCEG score recompute
  6. 2026-10-03 04:07 UTCGHSA enrichment
  7. 2026-10-02 15:38 UTCGHSA enrichment
  8. 2026-10-02 03:10 UTCEG score recompute
  9. 2026-10-02 03:10 UTCGHSA enrichment
  10. 2026-10-01 19:49 UTCEPSS rescore
  11. 2026-10-01 14:38 UTCGHSA enrichment
  12. 2026-10-01 02:09 UTCEG score recompute
  13. 2026-10-01 02:09 UTCGHSA enrichment
  14. 2026-09-30 15:02 UTCEPSS rescore
  15. 2026-09-30 13:41 UTCGHSA enrichment
  16. 2026-09-30 01:12 UTCEG score recompute
  17. 2026-09-30 01:11 UTCGHSA enrichment
  18. 2026-09-29 15:20 UTCEPSS rescore
  19. 2026-09-29 12:43 UTCGHSA enrichment
  20. 2026-09-29 00:14 UTCEG score recompute
  21. 2026-09-29 00:14 UTCGHSA enrichment
  22. 2026-09-28 13:50 UTCEPSS rescore
  23. 2026-09-28 11:46 UTCGHSA enrichment
  24. 2026-09-27 23:18 UTCEG score recompute
  25. 2026-09-27 23:18 UTCGHSA enrichment
Show 38 more
  1. 2026-09-27 10:49 UTCGHSA enrichment
  2. 2026-09-26 22:21 UTCEG score recompute
  3. 2026-09-26 22:21 UTCGHSA enrichment
  4. 2026-09-26 15:58 UTCEPSS rescore
  5. 2026-09-26 09:49 UTCEG score recompute
  6. 2026-09-26 09:49 UTCGHSA enrichment
  7. 2026-09-25 21:19 UTCGHSA enrichment
  8. 2026-09-25 08:46 UTCGHSA enrichment
  9. 2026-09-24 20:17 UTCEG score recompute
  10. 2026-09-24 20:17 UTCGHSA enrichment
  11. 2026-09-24 07:48 UTCGHSA enrichment
  12. 2026-09-23 19:20 UTCEG score recompute
  13. 2026-09-23 19:20 UTCGHSA enrichment
  14. 2026-09-23 13:47 UTCEPSS rescore
  15. 2026-09-23 06:50 UTCGHSA enrichment
  16. 2026-09-22 18:21 UTCEG score recompute
  17. 2026-09-22 18:21 UTCGHSA enrichment
  18. 2026-09-22 05:52 UTCEG score recompute
  19. 2026-09-22 05:52 UTCGHSA enrichment
  20. 2026-09-21 17:24 UTCGHSA enrichment
  21. 2026-09-21 04:55 UTCEG score recompute
  22. 2026-09-21 04:55 UTCGHSA enrichment
  23. 2026-09-20 20:15 UTCEPSS rescore
  24. 2026-09-20 16:26 UTCGHSA enrichment
  25. 2026-09-20 03:58 UTCEG score recompute
  26. 2026-09-20 03:58 UTCGHSA enrichment
  27. 2026-09-19 15:29 UTCEG score recompute
  28. 2026-09-19 15:29 UTCGHSA enrichment
  29. 2026-09-19 14:30 UTCEG score recompute
  30. 2026-09-19 14:30 UTCGHSA enrichment
  31. 2026-09-19 02:12 UTCEG score recompute
  32. 2026-09-19 02:12 UTCGHSA enrichment
  33. 2026-09-18 19:27 UTCEPSS rescore
  34. 2026-09-18 13:39 UTCEG score recompute
  35. 2026-09-18 13:39 UTCGHSA enrichment
  36. 2026-09-18 08:27 UTCEG score recompute
  37. 2026-09-18 07:49 UTCEG score recompute
  38. 2026-09-18 07:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12954?
CVE-2026-12954 is a high vulnerability published on September 18, 2026. The Mapster WP Maps plugin for WordPress is vulnerable to Arbitrary User Meta Write in all versions up to, and including, 1.23.0 via the myprofileupdate() function. This is due to the function performing no nonce verification, no capability check, and no allowlist validation on the meta key…
When was CVE-2026-12954 disclosed?
CVE-2026-12954 was first published on September 18, 2026, with the most recent update on September 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12954 actively exploited?
CVE-2026-12954 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-12954?
CVE-2026-12954 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-12954?
No fix for CVE-2026-12954 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 vendor advisories EchelonGraph has for CVE-2026-12954 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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