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CVE-2026-61979 is an unauthenticated authentication bypass and privilege escalation vulnerability in the miniOrange SAML 2.0 Single Sign On plugin family for WordPress. The flaw is caused by signature algorithm confusion during SAML response validation: the plugin accepts the signature algorithm declared in an incoming SAML response instead of strictly enforcing the algorithm configured for the trusted identity provider. In the vulnerable code path, an attacker can select an HMAC-based algorithm such as HMAC-SHA1 and cause the plugin to treat the identity provider’s RSA public key as if it were a shared HMAC secret. Because that public key is not secret, an attacker can forge a SAML assertion for an arbitrary existing WordPress account and have the plugin accept the signature as valid. The issue has been described as affecting the free edition through 5.4.3, with broader reporting indicating analogous impact across multiple separately versioned commercial editions until their respective fixes.
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16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical authentication bypass vulnerability in the miniOrange SAML 2.0 Single Sign-On plugin for WordPress caused by signature algorithm confusion, allowing attackers to forge SAML assertions and log in as any existing user, including administrators.
Authentication bypass flaw in the miniOrange SAML 2.0 Single Sign On WordPress plugin that lets an attacker choose HMAC-SHA1 for incoming SAML responses, enabling forged SAML signatures by treating the IdP RSA public key as a shared secret.
An unauthenticated privilege escalation vulnerability in the Xecurify miniOrange SAML 2.0 Single Sign On WordPress plugin caused by signature algorithm confusion, allowing attackers to sign in as arbitrary WordPress users including administrators.
An authentication bypass vulnerability in the miniOrange SAML 2.0 Single Sign On plugin for WordPress that lets an attacker manipulate the plugin into treating a public key as a shared secret, enabling forged SAML signatures.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.