CVE-2026-82842

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-20. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.1Exploit: 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 SAML Single Sign On WordPress plugin before 6.0.0 does not honour the configured criterion for linking an incoming single sign-on identity to a WordPress account, always resolving the identity by login name whatever the site has chosen, which allows an attacker who can have the site's identity provider assert a login name of their choosing to authenticate as any account, including an administrator, without proving ownership of that account.

CVSS v3
8.1
EG Score
8.1HIGHhigh confidence
EG Risk
37
EG Risk 37/100CISA 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
Severity81% × 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
0.4%
EPSS %ILE
28th
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 20, 2026

Last Modified

September 21, 2026

Advisory Details (1)

Auto-updated Sep 20, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

SAML Single Sign On < 6.0.0 – Unauthenticated Privilege Escalation via Account Matching | CVE 2026-82842 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/4ae66b2c-a0de-405f-baca-127302257540/

Vendor Advisories for CVE-2026-82842(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 26× in last 7d / 62× 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 23:32 UTCEG score recompute
  2. 2026-10-04 23:32 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 10:44 UTCGHSA enrichment
  5. 2026-10-03 21:55 UTCEG score recompute
  6. 2026-10-03 21:55 UTCGHSA enrichment
  7. 2026-10-03 14:26 UTCEPSS rescore
  8. 2026-10-03 09:03 UTCGHSA enrichment
  9. 2026-10-02 20:06 UTCEG score recompute
  10. 2026-10-02 20:05 UTCGHSA enrichment
  11. 2026-10-02 17:57 UTCEPSS rescore
  12. 2026-10-02 07:14 UTCEG score recompute
  13. 2026-10-02 07:14 UTCGHSA enrichment
  14. 2026-10-01 19:50 UTCEPSS rescore
  15. 2026-10-01 18:25 UTCGHSA enrichment
  16. 2026-10-01 05:37 UTCGHSA enrichment
  17. 2026-09-30 16:49 UTCEG score recompute
  18. 2026-09-30 16:49 UTCGHSA enrichment
  19. 2026-09-30 15:04 UTCEPSS rescore
  20. 2026-09-30 02:52 UTCEG score recompute
  21. 2026-09-30 02:52 UTCGHSA enrichment
  22. 2026-09-29 14:04 UTCGHSA enrichment
  23. 2026-09-29 01:16 UTCEG score recompute
  24. 2026-09-29 01:16 UTCGHSA enrichment
  25. 2026-09-28 13:52 UTCEPSS rescore
Show 37 more
  1. 2026-09-28 12:28 UTCGHSA enrichment
  2. 2026-09-27 23:39 UTCEG score recompute
  3. 2026-09-27 23:39 UTCGHSA enrichment
  4. 2026-09-27 13:48 UTCEPSS rescore
  5. 2026-09-27 10:49 UTCGHSA enrichment
  6. 2026-09-26 22:00 UTCEG score recompute
  7. 2026-09-26 22:00 UTCGHSA enrichment
  8. 2026-09-26 15:59 UTCEPSS rescore
  9. 2026-09-26 09:12 UTCEG score recompute
  10. 2026-09-26 09:12 UTCGHSA enrichment
  11. 2026-09-25 20:23 UTCGHSA enrichment
  12. 2026-09-25 07:22 UTCGHSA enrichment
  13. 2026-09-24 18:34 UTCEG score recompute
  14. 2026-09-24 18:34 UTCGHSA enrichment
  15. 2026-09-24 14:04 UTCEPSS rescore
  16. 2026-09-24 05:45 UTCEG score recompute
  17. 2026-09-24 05:45 UTCGHSA enrichment
  18. 2026-09-23 17:54 UTCEPSS rescore
  19. 2026-09-23 16:57 UTCGHSA enrichment
  20. 2026-09-23 04:07 UTCEG score recompute
  21. 2026-09-23 04:07 UTCGHSA enrichment
  22. 2026-09-22 16:01 UTCEPSS rescore
  23. 2026-09-22 15:18 UTCGHSA enrichment
  24. 2026-09-22 02:29 UTCEG score recompute
  25. 2026-09-22 02:29 UTCGHSA enrichment
  26. 2026-09-21 21:09 UTCEPSS rescore
  27. 2026-09-21 13:41 UTCGHSA enrichment
  28. 2026-09-21 03:18 UTCEG score recompute
  29. 2026-09-21 03:17 UTCGHSA enrichment
  30. 2026-09-20 20:16 UTCEPSS rescore
  31. 2026-09-20 14:29 UTCGHSA enrichment
  32. 2026-09-20 13:56 UTCEG score recompute▲ 8.10
  33. 2026-09-20 13:56 UTCGHSA enrichment
  34. 2026-09-20 13:56 UTCMITRE cvelistV5CVSS v3 → 8.1 · severity → HIGH
  35. 2026-09-20 07:20 UTCNVD update
  36. 2026-09-20 06:25 UTCEG score recompute
  37. 2026-09-20 06:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-82842?
CVE-2026-82842 is a high vulnerability published on September 20, 2026. The SAML Single Sign On WordPress plugin before 6.0.0 does not honour the configured criterion for linking an incoming single sign-on identity to a WordPress account, always resolving the identity by login name whatever the site has chosen, which allows an attacker who can have the site's identity…
When was CVE-2026-82842 disclosed?
CVE-2026-82842 was first published on September 20, 2026, with the most recent update on September 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82842 actively exploited?
CVE-2026-82842 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (28th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-82842?
CVE-2026-82842 has a CVSS v3.1 base score of 8.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-82842?
No fix for CVE-2026-82842 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-2026-82842 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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