CVE-2026-38948
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 · uneditedCross-Site Scripting (XSS) vulnerability exists in FUEL CMS v1.5.2 and before within the asset upload functionality. The application fails to properly sanitize uploaded SVG files, allowing a low-privileged authenticated user to upload a crafted SVG file containing malicious code.
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 · moderate confidenceCross-Site Scripting (XSS) vulnerability in FUEL CMS v1.5.2 and prior where the asset upload functionality fails to sanitize SVG files. Low-privileged authenticated users can upload crafted SVG files containing malicious JavaScript that executes when the file is viewed or accessed by other users.
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
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
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 FUEL CMS installation and versionLocate the FUEL CMS installation directory and check the version file (typically found in fuel/application/config/constants.php or a VERSION file in the root directory)Affected if The installed version is 1.5.2 or any prior version
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Verify if asset upload module is enabledCheck the FUEL CMS configuration files (fuel/application/config/config.php or fuel/application/config/MY_fuel_modules.php) to confirm the assets module is not disabledAffected if The assets module is enabled and accessible
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Confirm low-privileged user access to asset uploadLog in as a low-privileged user (non-admin) and navigate to the assets/upload section, or inspect user permission configurations in the FUEL admin settingsAffected if Users with limited permissions can access and use the asset upload feature
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Test SVG file upload capabilityAttempt to upload a test SVG file through the asset upload interface at /fuel/assets/items/upload or /fuel/assets/createAffected if SVG file uploads are accepted and the file is stored in the assets directory
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Inspect how uploaded SVG files are servedUpload an SVG file and access it via the browser, then use browser developer tools or a HEAD request to inspect the Content-Type and Content-Disposition headers returned by the serverAffected if The SVG is served with Content-Type: image/svg+xml and lacks Content-Disposition: attachment, allowing inline rendering in browsers
A user is affected if they are running FUEL CMS version 1.5.2 or prior, have the asset upload feature enabled for low-privileged users, and uploaded SVG files are served inline without sanitization.
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 dataImplement SVG file sanitization/stripping of script tags and event handlers during upload, or serve uploaded SVG files with Content-Disposition: attachment header and proper Content-Type to prevent in-browser rendering of embedded scripts.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-38948 — 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-2026-38948 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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