Medium severity · published Sep 17, 2025
CVE-2025-58767
REXML has a DoS condition when parsing malformed XML file
5.3
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RE
rexml · ruby
>= 3.3.3, < 3.4.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-58767
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-58767
Patch
https://github.com/ruby/rexml/commit/5859bdeac792687eaf93d8e8f0b7e3c1e2ed5c23
Vendor Advisory
https://github.com/ruby/rexml/security/advisories/GHSA-c2f4-jgmc-q2r5
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