CVE-2026-82183highCWE-287

CVE-2026-82183: high-severity vulnerability in OAuth Single Sign On

OAuth Single Sign On 6.25.0 - 7.0.0 - Unauthenticated Account Takeover via Unverified Steam OpenID Assertion

Published

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41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.1epss 0.4%
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Unknown · OAuth Single Sign On
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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In the same product, most dangerous first.

CVE-2023-1093MEDIUMOAuth Single Sign On - SSO (OAuth Client) < 6.24.2 - IdP Discard via CSRFEPSS 0.3%