CVE-2025-41052
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 vulnerability has been discovered in appRain CMF version 4.0.5, consisting of a stored authenticated XSS due to a lack of proper validation of user input, through the 'data[Addon][layouts]' and 'data[Addon][layouts_except]' parameters in /apprain/developer/addons/update/canvasjs.
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 stored authenticated Cross-Site Scripting (XSS) vulnerability exists in appRain CMF version 4.0.5 due to insufficient input validation on the 'data[Addon][layouts]' and 'data[Addon][layouts_except]' parameters within the /apprain/developer/addons/update/canvasjs endpoint. The lack of proper sanitization allows authenticated attackers to inject malicious JavaScript code that persists on the server and executes in browsers of other users viewing the affected content.
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= 4.0.5CVSS 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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Confirm appRain CMF installationIdentify whether appRain CMF is present in the environment by checking for characteristic file structures or banner information from web responsesAffected if appRain CMF version 4.0.5 is installed
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Verify installed versionLocate and read version information from the appRain installation (such as version files, configuration, or admin interface 'About' section)Affected if The installed version is exactly 4.0.5
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Check if developer module is accessibleAttempt to access or enumerate routes under /apprain/developer/ path to determine if the developer module is enabledAffected if The developer module is accessible without restriction
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Verify canvasjs addon presenceCheck if the canvasjs addon is installed and enabled within the appRain addons systemAffected if The canvasjs addon exists in the system
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Confirm authentication accessDetermine if user accounts exist and authentication is functional for accessing the developer endpointsAffected if Authenticated access to the affected endpoint is possible
A user is affected if they have appRain CMF version 4.0.5 running with the developer module enabled, the canvasjs addon present, and authenticated access to the /apprain/developer/addons/update/canvasjs endpoint.
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 strict input validation and output encoding for the affected parameters, including whitelist-based validation for layout values and context-aware output encoding before rendering user-supplied data in HTML.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-41052 — 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-2025-41052 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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