File exfiltration via trusted help-document scripts
Published Apr 3, 2025 · Updated Jun 29, 2026
Arbitrary file read in GNOME Yelp before 42.3 allows remote attackers to exfiltrate user-readable files through a malicious help document. Yelp processes XInclude references in Mallard XML, and yelp-xsl copies embedded SVG content into WebKitGTK output, allowing an SVG script to transmit included file contents. Exploitation requires the document to reach the local filesystem and Yelp to open its ghelp URI; browser confirmation is required except where external links launch automatically.
Summary
What happened
Arbitrary file read in GNOME Yelp before 42.3 allows remote attackers to exfiltrate user-readable files through a malicious help document. Yelp processes XInclude references in Mallard XML, and yelp-xsl copies embedded SVG content into WebKitGTK output, allowing an SVG script to transmit included file contents. Exploitation requires the document to reach the local filesystem and Yelp to open its ghelp URI; browser confirmation is required except where external links launch automatically.
The record
- CVE
- CVE-2025-3155
- Published
- Apr 3, 2025
- Updated
- Jun 29, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
- Classifications
- CWE-601, T1204.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 3, 2025CVE publishedPublication date reported by the CVE source.
- Jun 29, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Browser-to-Yelp malicious Mallard document proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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