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ApprainApplication

CVE-2025-41055

MEDIUM · 5.4 CVSS v3.1 Published 2025-09-04
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
58/100
Remediation priority · Elevated
Remotely reachable

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 · unedited
A 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/dialogs.

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 confidence

A stored authenticated cross-site scripting (XSS) vulnerability exists in appRain CMF version 4.0.5. The application fails to properly validate user input in the 'data[Addon][layouts]' and 'data[Addon][layouts_except]' parameters within the /apprain/developer/addons/update/dialogs endpoint, allowing authenticated attackers to inject malicious JavaScript code that persists on the server.

MitigationImplement strict input validation and output encoding for the affected parameters. Since this is a stored XSS, both sanitizing input before storage and encoding output before rendering are required. Check for vendor patches; if unavailable, manually add validation routines.

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
ApprainApplication
Affected:= 4.0.5

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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify appRain CMF installation
    Check your web server document root for the appRain directory structure. Look for the main index.php file and verify it is the appRain CMF application.
    Affected if The application installed is appRain CMF
  2. Verify appRain version is 4.0.5
    Locate the version file or configuration file in the appRain installation. Common locations include a version.php file or the main configuration. Compare your installed version to 4.0.5.
    Affected if The installed version is exactly 4.0.5
  3. Confirm authentication to vulnerable endpoint
    Determine if you have valid authentication credentials for the appRain admin panel. The /apprain/developer/addons/update/dialogs endpoint requires an authenticated session to be accessed.
    Affected if You have authenticated access to the appRain admin panel
  4. Inspect addon configuration parameters
    Navigate to the addons section in the admin panel and examine the request parameters sent when updating addon settings. Look specifically for 'data[Addon][layouts]' and 'data[Addon][layouts_except]' parameters in the HTTP request.
    Affected if The parameters data[Addon][layouts] or data[Addon][layouts_except] are present in addon configuration
  5. Check for stored XSS in addon layouts
    Review the application database or file storage where addon layouts are saved. Look for any unsanitized HTML or JavaScript content that may have been injected into the layouts fields.
    Affected if Arbitrary JavaScript or HTML tags are stored in the addon layout configuration fields

You are affected if appRain CMF version 4.0.5 is running, you have authenticated admin access, and the addon layout parameters contain unsanitized stored content.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement strict input validation and output encoding for the affected parameters. Since this is a stored XSS, both sanitizing input before storage and encoding output before rendering are required. Check for vendor patches; if unavailable, manually add validation routines.

Fix this in Apprain Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA1.0 h
10.0 hours of engineering $1,750
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-41055 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
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  • Version or environment caveats, and links to real fixes
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