CVE-2026-24350
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 · uneditedPluXml CMS is vulnerable to Stored XSS in file uploading functionality. An authenticated attacker can upload an SVG file containing a malicious payload, which will be executed when a victim clicks the link associated with the uploaded image. In version 5.9.0-rc7 clicking the link associated with the uploaded image doesn't execute malicious code but directly accessing the file will still execute the embedded payload. The vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Only versions 5.8.21 and 5.9.0-rc7 were tested and confirmed as vulnerable, other versions were not tested and might also be vulnerable.
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 confidencePluXml CMS suffers from a stored XSS vulnerability in its file upload functionality. An authenticated attacker can upload SVG files containing malicious JavaScript payloads. In version 5.8.21, the XSS executes when a victim clicks the uploaded file's link. In version 5.9.0-rc7, clicking the link doesn't execute but direct file access still triggers the payload.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 5.8.21= 5.9.0CVSS 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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Verify PluXml versionAccess the admin dashboard and check the version information typically found in the About section or footer, or inspect version.php in the root directory if accessibleAffected if The installed version matches 5.8.21 or 5.9.0 (or falls within the 5.9.0 release candidate range)
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Confirm file upload feature is accessibleLog in as an authenticated user with upload permissions and navigate to the media/file upload section of the admin panelAffected if The upload functionality is enabled and accessible to the authenticated user role
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Check if SVG upload is permittedAttempt to upload a test SVG file through the media upload interface, observing whether the file type is accepted or rejectedAffected if SVG files are accepted by the upload mechanism without validation or blocking
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Inspect uploaded SVG files for malicious contentReview any existing SVG files in the data/media or similar upload directories, examining file contents for embedded script tags, event handlers, or JavaScript URIsAffected if SVG files containing script elements or JavaScript event handlers are present in the upload directory
A user is affected if running PluXml 5.8.1 or 5.9.0 with the file upload feature enabled and SVG files are accepted without server-side 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 dataDisable or restrict SVG file uploads in the CMS, or implement server-side sanitization of SVG content to strip embedded JavaScript. Alternatively, serve uploaded files with Content-Disposition: attachment headers to prevent script execution in the browser context.
- 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-2026-24350 — 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-2026-24350 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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