CVE-2026-81342

MEDIUMPre-NVD 4.74.7—
EchelonGraph scoreHIGH confidence

Score 4.7 from GitHub Security Advisory published 2026-08-29. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
4.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.7Exploit: None knownExposed: 0

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

The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.43 does not validate a redirect parameter supplied during user registration before using it, allowing unauthenticated attackers to redirect users to arbitrary external URLs.

CVSS v3
4.7
EG Score
4.7(high)
EG Risk
21(Track)
EG Risk 21/100SSVC: Track

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
Severity47% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

August 29, 2026

Last Modified

August 31, 2026

Advisory Details (1)

Auto-updated Aug 30, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

MasterStudy LMS < 3.7.43 – Unauthenticated Open Redirect | CVE 2026-81342 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/f6f89b50-3087-4fb6-ba12-93fdc1bcc9ed/

Vendor Advisories for CVE-2026-81342(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 18× in last 7d / 65× 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. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 00:29 UTCEG score recompute
  3. 2026-09-20 00:29 UTCGHSA enrichment
  4. 2026-09-18 22:59 UTCEG score recompute
  5. 2026-09-18 22:59 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-17 21:30 UTCEG score recompute
  8. 2026-09-17 21:30 UTCGHSA enrichment
  9. 2026-09-16 20:00 UTCEG score recompute
  10. 2026-09-16 20:00 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 18:27 UTCEG score recompute
  14. 2026-09-15 18:27 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 16:29 UTCEG score recompute
  18. 2026-09-14 16:29 UTCGHSA enrichment
  19. 2026-09-13 14:56 UTCEG score recompute
  20. 2026-09-13 14:55 UTCGHSA enrichment
  21. 2026-09-12 13:18 UTCEG score recompute
  22. 2026-09-12 13:18 UTCGHSA enrichment
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 14:53 UTCEPSS rescore
  25. 2026-09-11 11:48 UTCEG score recompute
Show 40 more
  1. 2026-09-11 11:48 UTCGHSA enrichment
  2. 2026-09-10 09:56 UTCEG score recompute
  3. 2026-09-10 09:56 UTCGHSA enrichment
  4. 2026-09-09 08:26 UTCEG score recompute
  5. 2026-09-09 08:26 UTCGHSA enrichment
  6. 2026-09-08 22:01 UTCEPSS rescore
  7. 2026-09-08 06:56 UTCEG score recompute
  8. 2026-09-08 06:56 UTCGHSA enrichment
  9. 2026-09-07 05:27 UTCEG score recompute
  10. 2026-09-07 05:27 UTCGHSA enrichment
  11. 2026-09-06 13:48 UTCEPSS rescore
  12. 2026-09-06 03:54 UTCEG score recompute
  13. 2026-09-06 03:54 UTCGHSA enrichment
  14. 2026-09-05 15:31 UTCEPSS rescore
  15. 2026-09-05 02:25 UTCEG score recompute
  16. 2026-09-05 02:25 UTCGHSA enrichment
  17. 2026-09-04 05:07 UTCEPSS rescore
  18. 2026-09-04 00:53 UTCGHSA enrichment
  19. 2026-09-02 23:23 UTCEG score recompute
  20. 2026-09-02 23:23 UTCGHSA enrichment
  21. 2026-09-02 14:12 UTCEPSS rescore
  22. 2026-09-01 21:52 UTCEG score recompute
  23. 2026-09-01 21:52 UTCGHSA enrichment
  24. 2026-09-01 13:54 UTCEPSS rescore
  25. 2026-09-01 04:40 UTCEPSS rescore
  26. 2026-09-01 04:40 UTCEPSS rescore
  27. 2026-08-31 20:22 UTCGHSA enrichment
  28. 2026-08-31 03:00 UTCEG score recompute
  29. 2026-08-31 02:59 UTCGHSA enrichment
  30. 2026-08-30 19:18 UTCEPSS rescore
  31. 2026-08-30 19:17 UTCEPSS rescore
  32. 2026-08-30 01:29 UTCEG score recompute
  33. 2026-08-30 01:29 UTCGHSA enrichment
  34. 2026-08-30 01:22 UTCEPSS rescore
  35. 2026-08-30 01:08 UTCEG score recompute▲ 4.70
  36. 2026-08-30 01:08 UTCGHSA enrichment
  37. 2026-08-30 01:08 UTCMITRE cvelistV5CVSS v3 → 4.7 · severity → MEDIUM
  38. 2026-08-29 06:21 UTCNVD update
  39. 2026-08-29 06:13 UTCEG score recompute
  40. 2026-08-29 06:12 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-81342?
CVE-2026-81342 is a medium vulnerability published on August 29, 2026. The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.43 does not validate a redirect parameter supplied during user registration before using it, allowing unauthenticated attackers to redirect users to arbitrary external URLs.
When was CVE-2026-81342 disclosed?
CVE-2026-81342 was first published in the National Vulnerability Database on August 29, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81342 actively exploited?
CVE-2026-81342 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.2% of all scored CVEs.
What is the CVSS score of CVE-2026-81342?
CVE-2026-81342 has a CVSS v3.1 base score of 4.7 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-81342?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81342, 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.

Dependency Blast Radius

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