CVE-2025-13502
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA flaw was found in WebKitGTK and WPE WebKit. This vulnerability allows an out-of-bounds read and integer underflow, leading to a UIProcess crash (DoS) via a crafted payload to the GLib remote inspector server.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceAn out-of-bounds read with integer underflow in WebKitGTK and WPE WebKit's GLib remote inspector server allows a crafted payload to crash the UIProcess, causing denial of service.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify if WebKitGTK or WPE WebKit is installedCheck for the presence of the WebKit library: for WebKitGTK, look for libwebkit2gtk-4.1.so or libwebkitgtk-4.0.so in /usr/lib or via pkg-config --modversion webkit2gtk-4.1; for WPE WebKit, look for libwpe-1.0.so or check pkg-config --modversion wpewebkitAffected if Either WebKitGTK or WPE WebKit is present on the system
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Determine installed version of WebKitGTKRun dpkg -l libwebkit2gtk-4.1-0 (Debian/Ubuntu), rpm -qa | grep webkit2gtk (RHEL/Fedora), or check the library file directly with strings on the .so file and look for version markersAffected if Version cannot be determined or is older than the patched release (no specific version range provided in CVE data)
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Determine installed version of WPE WebKitCheck via pkg-config --modversion wpewebkit, or examine the installed package version with the system package managerAffected if Version cannot be determined or is older than the patched release (no specific version range provided in CVE data)
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Check if GLib remote inspector is enabledInspect WebKit settings: if using WebKitGTK, check for WebKitSettings with remote-inspector enabled in application code, configuration files, or environment variables WEBKIT_INSPECTOR_SERVER; for WPE WebKit, examine the WebKitSettings or initialization code for remote inspector configurationAffected if The remote inspector/server is explicitly enabled in application settings, configuration, or environment variables
A user is affected if they have WebKitGTK or WPE WebKit installed AND the GLib remote inspector is enabled, regardless of version since no patched version range was specified in the CVE data.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate WebKitGTK and WPE WebKit to the patched version. If the remote inspector is not required, disable it to reduce attack surface.
- Consultation1.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-13502 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-13502 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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