#VU111978 Improper Verification of Cryptographic Signature in xml-crypto - CVE-2025-29774

Vulnerability identifier: #VU111978

Vulnerability risk: Critical

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Red]

CVE-ID: CVE-2025-29774

CWE-ID: CWE-347

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
xml-crypto
Universal components / Libraries / Libraries used by multiple products

Vendor: Node SAML Organization

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to authentication bypass. A remote unauthenticated attacker can exploit a vulnerability to bypass authentication or authorization mechanisms in systems that rely on xml-crypto for verifying signed XML documents by modifying a valid signed XML message in a way that still passes signature verification checks.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

xml-crypto: 2.0.0 - 6.0.0

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External links
https://github.com/node-saml/xml-crypto/commit/28f92218ecbb8dcbd238afa4efbbd50302aa9aed
https://github.com/node-saml/xml-crypto/commit/886dc63a8b4bb5ae1db9f41c7854b171eb83aa98
https://github.com/node-saml/xml-crypto/commit/8ac6118ee7978b46aa56b82cbcaa5fca58c93a07
https://github.com/node-saml/xml-crypto/releases/tag/v2.1.6
https://github.com/node-saml/xml-crypto/releases/tag/v3.2.1
https://github.com/node-saml/xml-crypto/releases/tag/v6.0.1
https://github.com/node-saml/xml-crypto/security/advisories/GHSA-9p8x-f768-wp2g
https://workos.com/blog/samlstorm

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.