CVE-2023-31804
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 vulnerability found in Chamilo Lms v.1.11.18 allows a local attacker to execute arbitrary code via the course category parameters.
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 confidenceA Cross Site Scripting (XSS) vulnerability in Chamilo Lms v1.11.18 allows injection of arbitrary JavaScript code through course category parameters. The application fails to properly sanitize or encode user input before rendering it in the browser.
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= 1.11.18CVSS 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 the Chamilo Lms installation and versionLocate the Chamilo installation and check the version number. This is typically visible in the admin panel, a configuration file, or the footer of the web interface.Affected if The installed version is exactly 1.11.18 (no other versions are listed as affected in this CVE)
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Verify course category functionality existsConfirm that the course category feature is present in the installation. Course categories are typically managed through the admin or course management interface.Affected if The course category module is enabled and accessible in the application
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Confirm user access to course category creation or editingDetermine whether standard users, instructors, or administrators can create or modify course categories through the web interface.Affected if Users can submit or modify course category names/parameters without the application sanitizing the input
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Test for reflected input in course category display pagesIf you have access, attempt to create a course category with a simple script tag or JavaScript event handler in the name field, then view the category in the browser. Inspect the page source to see if the input is rendered as plain text or as executed code.Affected if The submitted course category value appears unencoded or executes as JavaScript when the page displays it
You are affected if you are running Chamilo Lms version 1.11.18 and the course category feature is accessible to users who can inject unsanitized input that renders without proper encoding.
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 proper input validation and output encoding for course category parameters. Sanitize all user-supplied input before storage and apply context-aware output encoding when displaying course category data.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-31804 — 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-2023-31804 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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- Version or environment caveats, and links to real fixes
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