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VulnerabilityPublished

CVE-2025-41058: appRain CMF · XSS or 'Cross-site Scripting'

Affects appRain CMFSource CVE Database V5

0

Not known to be exploited · CVSS 5.1 Medium.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 4.0 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Sep 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
appRain appRain CMFAffected
  • =4.0.5
Fixed in–

AI-suggested

  1. Immediate mitigation should include restricting access to the /apprain/developer/addons/update/row_manager endpoint to only highly trusted administrators and monitoring for unusual activity.
  2. Implement strict input validation and output encoding on the affected parameters ('data[Addon][layouts]' and 'data[Addon][layouts_except]') to neutralize any injected scripts.
  3. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers.
  4. Conduct thorough code review and security testing of all user input handling in appRain CMF, especially in developer and addon management modules.
  5. Monitor logs for signs of exploitation attempts or anomalous user behavior.
  6. Educate users about the risks of XSS and encourage the use of multi-factor authentication to reduce the impact of session hijacking.
  7. Stay updated with vendor advisories for patches or official fixes and apply them promptly once available.
  8. Consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block malicious payloads targeting these parameters.

Description

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/row_manager.

References

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