CVE-2025-41063: appRain CMF · XSS or 'Cross-site Scripting'
Affects appRain CMFSource CVE Database V5
Not known to be exploited · CVSS 4.8 Medium.
Data as of 26 Oct 2026, 14:05 UTC
- 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:NExploitation evidence
Disclosed: evidence found.
CVE published 4 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| appRain appRain CMF | Affected
| Fixed in– |
AI-suggested
- 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.
- Implement strict input validation and output encoding on the 's' parameter to neutralize any malicious scripts before rendering.
- Monitor logs and user activity for unusual patterns that might indicate exploitation attempts, especially from authenticated users.
- Enforce strong authentication mechanisms, such as multi-factor authentication (MFA), to reduce the risk of credential compromise.
- If possible, upgrade to a newer, patched version of appRain CMF once available or apply vendor-provided patches promptly.
- Conduct security awareness training for developers and users with access to developer tools to recognize and report suspicious activities.
- Employ Content Security Policy (CSP) headers to limit the impact of any potential XSS exploitation by restricting script execution sources.
- 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.