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ApprainApplication

CVE-2025-41039

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[sconfig][admin_landing_page]', 'data[sconfig][currency]', 'data[sconfig][db_version]', 'data[sconfig][default_pagination]', 'data[sconfig][emailsetup_from_email]', 'data[sconfig][emailsetup_host]', 'data[sconfig][emailsetup_password]', 'data[sconfig][emailsetup_port]', 'data[sconfig][emailsetup_username]', 'data[sconfig][fileresource_id]', 'data[sconfig][large_image_height]', 'data[sconfig][large_image_width]' and 'data[sconfig][time_zone_padding]' parameters in /apprain/admin/config/opts.

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 in appRain CMF version 4.0.5 allows authenticated attackers to inject malicious JavaScript through 13 different configuration parameters in the admin panel at /apprain/admin/config/opts. The application fails to properly validate and sanitize user input before storing it, allowing the payload to be persistently executed when other administrators view the affected configuration pages.

MitigationImplement robust input validation and context-aware output encoding for all configuration parameters in the admin panel. Apply allowlist validation where possible and ensure all user-supplied data is properly escaped before storage and display.

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. Confirm appRain CMF installation and version
    Locate the version file or admin footer that displays the appRain CMF version number. Common paths include version.php, config.php, or the admin dashboard footer.
    Affected if The installed version is exactly 4.0.5
  2. Verify admin panel access
    Navigate to the /apprain/admin/config/opts endpoint or locate the configuration options page within the admin panel. Confirm you have authenticated access to this settings area.
    Affected if The admin configuration page is accessible and displays configuration input fields
  3. Inspect configuration parameter handling
    Examine the source code or HTTP responses when saving configuration values. Check if the application performs input validation, sanitization, or encoding on the 13 configuration parameters before storing them.
    Affected if The application accepts and stores configuration input without validating or sanitizing special characters like <, >, ", or script tags
  4. Check stored value rendering
    After saving configuration values containing test characters (such as <script>alert(1)</script> or <img src=x onerror=alert(1)>), navigate back to the configuration page or have another admin view it. Inspect the HTML source to see if the values are rendered with encoding or as raw content.
    Affected if The stored configuration values are rendered in the page HTML without being entity-encoded (e.g., < appears as < rather than &lt;)

A user is affected if they are running appRain CMF version 4.0.5 and can access the admin configuration panel where unsanitized input is stored and displayed without proper encoding.

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 robust input validation and context-aware output encoding for all configuration parameters in the admin panel. Apply allowlist validation where possible and ensure all user-supplied data is properly escaped before storage and display.

Fix this in Apprain Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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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-2025-41039 in production — separate from our analysis above.

No notes yet

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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
  • 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
  • No spam, self-promotion, credentials, or personal data