CVE-2026-82183 OAuth Single Sign On 6.25.0 - 7.0.0 - Unauthenticated Account Takeover via Unverified Steam OpenID Assertion
Unauthenticated attackers can bypass Steam OpenID verification to log in as arbitrary users or create new accounts in the OAuth Single Sign On 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-2026-82183?
CVE-2026-82183 is a high-severity authentication bypass vulnerability in Unknown OAuth Single Sign On, published on 2 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The OAuth Single Sign On WordPress plugin before 7.0.1 does not verify the identity assertion returned by its Steam single sign-on flow, allowing unauthenticated attackers to log in as an arbitrary non-administrator user, and to create new accounts.
Weakness: CWE-287
Which versions are affected by CVE-2026-82183?
How do I fix CVE-2026-82183?
No fix has been published for CVE-2026-82183 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-2026-82183 being exploited?
There is no known exploitation of CVE-2026-82183 in the wild and no public exploit code.
Sources
Also known as GHSA-f9w9-q3c6-p58g.