CVE-2025-29774 xml-crypto Vulnerable to XML Signature Verification Bypass via Multiple SignedInfo References
Attackers can bypass XML signature verification to modify signed messages, enabling privilege escalation or user impersonation in systems using xml-crypto.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-29774?
CVE-2025-29774 is a critical vulnerability in node-saml xml-crypto, published on 14 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-347
Which versions are affected by CVE-2025-29774?
6 open source packages ship an affected version, including xml-crypto.
| Package | Affected | Fixed in |
|---|---|---|
xml-crypto npm | All versions | 2.1.6 |
xml-crypto npm | All versions | 2.1.6 |
xml-crypto npm | From 3.0.0 | 3.2.1 |
xml-crypto npm | From 3.0.0 | 3.2.1 |
xml-crypto npm | From 4.0.0 | 6.0.1 |
xml-crypto npm | From 4.0.0 | 6.0.1 |
How do I fix CVE-2025-29774?
Upgrade xml-crypto to a fixed version for your release line: 2.1.6, 3.2.1 or 6.0.1.
Is CVE-2025-29774 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-29774 exists.
Public exploit code: 2 proofs of concept on GitHub.
Sources
Also known as GHSA-9p8x-f768-wp2g.