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VulnerabilityPublished

CVE-2025-41063: appRain CMF · XSS or 'Cross-site Scripting'

Affects appRain CMFSource CVE Database V5

0

Not known to be exploited · CVSS 4.8 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 4.0 base score
4.8Medium
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:A/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/debug-log/db endpoint to only trusted and necessary personnel, ideally via network segmentation or IP whitelisting.
  2. Implement strict input validation and output encoding on the 's' parameter to neutralize any malicious scripts before rendering.
  3. Monitor logs and user activity for unusual patterns that might indicate exploitation attempts, especially from authenticated users.
  4. Enforce strong authentication mechanisms, such as multi-factor authentication (MFA), to reduce the risk of credential compromise.
  5. If possible, upgrade to a newer, patched version of appRain CMF once available or apply vendor-provided patches promptly.
  6. Conduct security awareness training for developers and users with access to developer tools to recognize and report suspicious activities.
  7. Employ Content Security Policy (CSP) headers to limit the impact of any potential XSS exploitation by restricting script execution sources.
  8. Regularly audit and review user permissions to ensure least privilege principles are enforced, minimizing the number of users who can access sensitive debug interfaces.

Description

A vulnerability has been discovered in version 4.0.5 of appRain CMF, consisting of an authenticated reflected XSS due to a lack of proper validation of user input, through the 's' parameter in /apprain/developer/debug-log/db.

References

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