CVE-2026-82842 SAML Single Sign On < 6.0.0 - Unauthenticated Privilege Escalation via Account Matching
Attackers can authenticate as any user, including administrators, by exploiting flawed SAML identity matching logic in the WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-82842?
CVE-2026-82842 is a high-severity authentication bypass vulnerability in Unknown SAML Single Sign On, published on 20 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-269
Which versions are affected by CVE-2026-82842?
How do I fix CVE-2026-82842?
No fix has been published for CVE-2026-82842 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-82842 being exploited?
There is no known exploitation of CVE-2026-82842 in the wild and no public exploit code.
Sources
Also known as GHSA-c354-pg28-5955.