Is there a public exploit for CVE-2026-76877?

No public exploit for CVE-2026-76877 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-76877?

CVE-2026-76877 scores CVSS 8.1 (v3.1), rated high.

What does CVE-2026-76877 affect?

CVE-2026-76877 affects WPML WPML Multilingual CMS.

8.1 High

The WPML Multilingual CMS plugin for WordPress is vulnerable to Authentication Bypass via Race Condition in versions up to, and including,…

CVE-2026-76877

The WPML Multilingual CMS plugin for WordPress is vulnerable to Authentication Bypass via Race Condition in versions up to, and including, 4.9.7. This is due to the processiframerequest function's language-per-domain SSO handler generating the cross-domain sign-in token via wpcreatenonce('wpmlsso') on the logout landing page, where the browser has already discarded its authentication cookies — so wpgetsessiontoken() returns an empty string and the token collapses to the shared anonymous nonce for the current 12-hour tick rather than a user-bound secret — and then storing it in the wpmlssouser transient mapped to the victim's userid with no binding to the specific sign-out action or requesting client. Because an unauthenticated attacker can independently derive the identical token by triggering the logout confirmation flow on wp-login.php?action=logout, and because the isiframerequest() gate conditions (the per-domain SSO started transient and domain-hash derived from the public constant SSONONCE) are fully computable within the 60-second SSOTIMEOUT window, an unauthenticated attacker can submit the forged wpmlssotokendomain parameter with a wpmlusersignedin status to a secondary…

Assessment

CVSS: 8.1 (v3.1)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 10 November 2026
Last updated: 10 November 2026
Affected: WPML · WPML Multilingual CMS
Assigner: Wordfence

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

At the source

EUVD (ENISA)

References

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