CVE-2025-48995mediumCWE-208

CVE-2025-48995: falha de média gravidade em XML-Security signxml

SignXML's signature verification with HMAC is vulnerable to a timing attack

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13Vexday Risk Score

Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.

ssvc Trackcvss 6.9epss 0.2%
SignXML is an implementation of the W3C XML Signature standard in Python. When verifying signatures with X509 certificate validation turned off and HMAC shared secret set (`signxml.XMLVerifier.verify(require_x509=False, hmac_key=...`), versions of SignXML prior to 4.0.4 are vulnerable to a potential timing attack. The verifier may leak information about the correct HMAC when comparing it with the user supplied hash, allowing users to reconstruct the correct HMAC for any data.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Produtos afetados
XML-Security · signxml
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CVE-2025-48994MEDIUMSignXML's signature verification with HMAC is vulnerable to an algorithm confusion attackEPSS 0.2%