CVE-2026-81655

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-27. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.5Exploit: 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 Ad Inserter WordPress plugin before 2.8.19 does not correctly restrict access to one of its settings pages, making it reachable by every logged in user under a configuration its own settings allow, and does not filter the content saved there, allowing users with a role as low as subscriber to store code which is then executed as PHP or served unescaped to site visitors.

CVSS v3
7.5
EG Score
7.5HIGHhigh confidence
EG Risk
34
EG Risk 34/100CISA 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
Severity75% × 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
0.2%
EPSS %ILE
12th
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 27, 2026

Last Modified

September 28, 2026

Advisory Details (1)

Auto-updated Sep 28, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Ad Inserter 2.8.12 – 2.8.18 – Subscriber+ RCE / Stored XSS via Global Custom Fields | CVE 2026-81655 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/b189ce9a-a930-41e6-bdd1-fdcc3bfb66be/

Vendor Advisories for CVE-2026-81655(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 29× in last 7d / 32× 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 02:16 UTCEG score recompute
  2. 2026-10-04 02:16 UTCGHSA enrichment
  3. 2026-10-03 14:26 UTCEPSS rescore
  4. 2026-10-03 13:22 UTCGHSA enrichment
  5. 2026-10-03 00:27 UTCEG score recompute
  6. 2026-10-03 00:27 UTCGHSA enrichment
  7. 2026-10-02 17:57 UTCEPSS rescore
  8. 2026-10-02 11:32 UTCGHSA enrichment
  9. 2026-10-01 22:30 UTCEG score recompute
  10. 2026-10-01 22:30 UTCGHSA enrichment
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-10-01 09:35 UTCGHSA enrichment
  13. 2026-09-30 20:39 UTCEG score recompute
  14. 2026-09-30 20:39 UTCGHSA enrichment
  15. 2026-09-30 15:04 UTCEPSS rescore
  16. 2026-09-30 07:45 UTCGHSA enrichment
  17. 2026-09-29 18:49 UTCEG score recompute
  18. 2026-09-29 18:48 UTCGHSA enrichment
  19. 2026-09-29 05:51 UTCEG score recompute
  20. 2026-09-29 05:51 UTCGHSA enrichment
  21. 2026-09-28 16:57 UTCGHSA enrichment
  22. 2026-09-28 15:14 UTCEG score recompute
  23. 2026-09-28 15:14 UTCGHSA enrichment
  24. 2026-09-28 13:52 UTCEPSS rescore
  25. 2026-09-28 02:19 UTCGHSA enrichment
Show 7 more
  1. 2026-09-28 01:28 UTCEG score recompute▲ 7.50
  2. 2026-09-28 01:28 UTCGHSA enrichment
  3. 2026-09-28 01:27 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  4. 2026-09-27 13:48 UTCEPSS rescore
  5. 2026-09-27 06:29 UTCNVD update
  6. 2026-09-27 06:04 UTCEG score recompute
  7. 2026-09-27 06:03 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-81655?
CVE-2026-81655 is a high vulnerability published on September 27, 2026. The Ad Inserter WordPress plugin before 2.8.19 does not correctly restrict access to one of its settings pages, making it reachable by every logged in user under a configuration its own settings allow, and does not filter the content saved there, allowing users with a role as low as subscriber to…
When was CVE-2026-81655 disclosed?
CVE-2026-81655 was first published on September 27, 2026, with the most recent update on September 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81655 actively exploited?
CVE-2026-81655 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (12th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-81655?
CVE-2026-81655 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-81655?
No fix for CVE-2026-81655 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-2026-81655 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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