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Fencer Intel
critical 9.1

CVE-2026-13332 json

Masteriyo LMS < 2.3.1 - Unauthenticated Arbitrary User Session Termination (Denial of Service)

published 3mo ago modified 3mo ago also EUVD-2026-49070

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

The Masteriyo LMS WordPress plugin before 2.3.1 does not correctly verify authorization on an unauthenticated AJAX action used to clear user sessions, allowing unauthenticated attackers to terminate the active sessions (force-logout) of any user on the site, including administrators.

Patch / fix

  • Unknown Masteriyo LMS 2.3.1

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CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
total
Assessed
3mo ago

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • wpscan.com https://wpscan.com/vulnerability/f987c823-f215-48f6-86fe-8d898f2c2d94/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

  • Unknown Masteriyo LMS

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.