CVE-2025-40934
9.3 · CRITICALOverview
CVE-2025-40934 is a critical-severity vulnerability affecting xml\ \. It was published on November 26, 2025 and has a CVSS 3.1 base score of 9.3 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
XML-Sig versions 0.27 through 0.67 for Perl incorrectly validates XML files if signatures are omitted.
An attacker can remove the signature from the XML document to make it pass the verification check.
XML-Sig is a Perl module to validate signatures on XML files. An unsigned XML file should return an error message. The affected versions return true when attempting to validate an XML file that contains no signatures.
Remediation
Check the references section for vendor advisories and patches from xml\. Update \ to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| xml\ | \ | 0.27 | Affected |
Frequently Asked Questions
What is CVE-2025-40934?
CVE-2025-40934 is a critical-severity vulnerability affecting xml\ \. It was published on November 26, 2025 and has a CVSS 3.1 base score of 9.3 (CRITICAL).
How severe is CVE-2025-40934?
This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-40934?
Check the references section for vendor advisories and patches from xml\. Update \ to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-40934?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-40934 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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