High severity7.5NVD Advisory· Published Mar 5, 2018· Updated Jun 17, 2026

CVE-2018-7644

Description

The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote attacker to construct a crafted SAML assertion on behalf of an Identity Provider that would pass as cryptographically valid, thereby allowing them to impersonate a user from that Identity Provider, aka a key confusion issue.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
simplesamlphp/saml2Packagist	< 1.10.5	1.10.5
simplesamlphp/saml2Packagist	>= 2.0, < 2.3.7	2.3.7
simplesamlphp/saml2Packagist	>= 3.0, < 3.1.3	3.1.3

Affected products

Simplesamlphp/Simplesamlphp
cpe:2.3:a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:*
Range: <1.15.3
ghsa-coords
pkg:composer/simplesamlphp/saml2
Range: < 1.10.5

Patches

Vulnerability mechanics

References

github.com/advisories/GHSA-923w-2xv2-7pr8ghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2018-7644ghsaADVISORY
simplesamlphp.org/security/201802-01nvdVendor AdvisoryWEB
github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/saml2/CVE-2018-7644.yamlghsaWEB

News mentions

No linked articles in our index yet.

cvss	0.488
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000