CVE-2025-27773GHSA-46R4-F8GJ-XG56
SimpleSAMLphp SAML2 library has incorrect signature verification for HTTP-Redirect binding
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 4.17.0, 5.0.0-alpha.20
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: poc
- Automatable: yes
- Technical impact: partial
Summary
The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. Prior to versions 4.17.0 and 5.0.0-alpha.20, there is a signature confusion attack in the HTTPRedirect binding. An attacker with any signed SAMLResponse via the HTTP-Redirect binding can cause the application to accept an unsigned message. Versions 4.17.0 and 5.0.0-alpha.20 contain a fix for the issue.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- simplesamlphp saml2
fixed in 4.17.0; From 5.0.0-alpha.1 · fixed in 5.0.0-alpha.20
- simplesamlphp/saml2Packagist
fixed in 4.17.0
- simplesamlphp/saml2Packagist
From 5.0.0-alpha.1 · fixed in 5.0.0-alpha.20
- simplesamlphp/saml2-legacyPackagist
fixed in 4.17.0