- Description
- 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 algorithm confusion attack. Unless the user explicitly limits the expected signature algorithms using the `signxml.XMLVerifier.verify(expect_config=...)` setting, an attacker may supply a signature unexpectedly signed with a key other than the provided HMAC key, using a different (asymmetric key) signature algorithm. Starting with SignXML 4.0.4, specifying `hmac_key` causes the set of accepted signature algorithms to be restricted to HMAC only, if not already restricted by the user.
- Source
- security-advisories@github.com
- NVD status
- Awaiting Analysis
CVSS 4.0
- Type
- Secondary
- Base score
- 6.9
- Impact score
- -
- Exploitability score
- -
- Vector string
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity
- MEDIUM
- security-advisories@github.com
- CWE-303
- Hype score
- Not currently trending
CVE-2025-48994 Algorithm Confusion Vulnerability in SignXML Prior to 4.0.4 https://t.co/yl04v9oD6W Customizable Vulnerability Alerts: https://t.co/U7998fz7yk
@VulmonFeeds
2 Jun 2025
38 Impressions
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CVE-2025-48994 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… https://t.co/4mxXJWOv0g
@CVEnew
2 Jun 2025
327 Impressions
0 Retweets
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