What’s Vulnerable › Vulnerabilities

CVE-2025-29774: xml-crypto Vulnerable to XML Signature Verification Bypass via Multiple SignedInfo References

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 9.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-14 · updated 2026-06-17
• Weakness: CWE-347

Description

xml-crypto is an XML digital signature and encryption library for Node.js. An attacker may be able to exploit a vulnerability in versions prior to 6.0.1, 3.2.1, and 2.1.6 to bypass authentication or authorization mechanisms in systems that rely on xml-crypto for verifying signed XML documents. The vulnerability allows an attacker to modify a valid signed XML message in a way that still passes signature verification checks. For example, it could be used to alter critical identity or access control attributes, enabling an attacker with a valid account to escalate privileges or impersonate another user. Users of versions 6.0.0 and prior should upgrade to version 6.0.1 to receive a fix. Those who are still using v2.x or v3.x should upgrade to patched versions 2.1.6 or 3.2.1, respectively.

Affected products

• node-saml xml-crypto: from 4.0.0, < 6.0.1; from 3.0.0, < 3.2.1; before 2.1.6

References

• 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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