What’s Vulnerable › Vulnerabilities

CVE-2024-34581

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-06-26 · updated 2026-06-17
• Weakness: CWE-918

Description

The W3C XML Signature Syntax and Processing (XMLDsig) specification, starting with 1.0, was originally published with a "RetrievalMethod is a URI ... that may be used to obtain key and/or certificate information" statement and no accompanying information about SSRF risks, and this may have contributed to vulnerable implementations such as those discussed in CVE-2023-36661 and CVE-2024-21893. NOTE: this was mitigated in 1.1 and 2.0 via a directly referenced Best Practices document that calls on implementers to be wary of SSRF.

Affected products

• w3c Xml Signature Syntax And Processing: before 1.1; before 2.0 — fixed in 1.1, 2.0

How to fix

Upgrade to a fixed version: w3c Xml Signature Syntax And Processing 1.1, 2.0. Check the vendor advisory for mitigations.

References

• https://github.com/zmanion/Vulnerabilities/blob/main/CVE-2024-21893.md
• https://www.w3.org/Signature/Drafts/WD-xmldsig-core-200003plc/
• https://www.w3.org/TR/2013/NOTE-xmldsig-bestpractices-20130411/
• https://www.w3.org/TR/xmldsig-core1/
• https://www.w3.org/TR/xmldsig-core2/
• https://github.com/zmanion/Vulnerabilities/blob/main/CVE-2024-21893.md
• https://www.w3.org/Signature/Drafts/WD-xmldsig-core-200003plc/
• https://www.w3.org/TR/2013/NOTE-xmldsig-bestpractices-20130411/
• https://www.w3.org/TR/xmldsig-core1/
• https://www.w3.org/TR/xmldsig-core2/

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