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Ruby REXML 3.3.3 < 3.4.2 DoS vulnerability
medium Nessus Plugin ID 265895
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Synopsis
The remote host has an application installed that is affected by a DoS vulnerability.Description
The version of the REXML Ruby library installed on the remote host is 3.3.3 prior to 3.4.2. It is, therefore, affected by a DoS vulnerability as referenced in GHSA-c2f4-jgmc-q2r5 advisory.- REXML is an XML toolkit for Ruby. The REXML gems from 3.3.3 to 3.4.1 has a DoS vulnerability when parsing XML containing multiple XML declarations. If you need to parse untrusted XMLs, you may be impacted to these vulnerabilities. The REXML gem 3.4.2 or later include the patches to fix these vulnerabilities.
(CVE-2025-58767)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to REXML version 3.4.2 or later.See Also
https://github.com/ruby/rexml/security/advisories/GHSA-c2f4-jgmc-q2r5
Plugin Details
Severity: Medium
ID: 265895
File Name: ruby_gem_rexml_GHSA-c2f4-jgmc-q2r5.nasl
Version: 1.5
Type: local
Agent: windows, macosx, unix
Family: Misc.
Published: 9/25/2025
Updated: 11/18/2025
Configuration: Enable thorough checks (optional)
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 1.4
CVSS v2
Risk Factor: Medium
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2025-58767
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.6
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 5.1
Threat Score: 1.2
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Vulnerability Information
CPE: cpe:/a:ruby:rexml
Required KB Items: Host/ruby/modules/enumerated
Patch Publication Date: 9/17/2025
Vulnerability Publication Date: 9/17/2025
Reference Information
CVE: CVE-2025-58767
IAVB: 2025-B-0155