Detections
Analytics

SCA: security update for signxml (GHSA-6vx8-pcwv-xhf4)

medium Tenable Self-Hosted Container Security Plugin ID 427839

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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.
 (CVE-2025-48994)

See Also

https://github.com/advisories/GHSA-6vx8-pcwv-xhf4

Plugin Details

Severity: Medium

ID: 427839

Version: Revision 1.6

Type: Local

Family: SCA Checks

Published: 6/5/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.92

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2025-48994

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

Vector: 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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/5/2025

Vulnerability Publication Date: 6/2/2025

Reference Information

CVE: CVE-2025-48994

cwe: CWE-303