CVE-2025-41042: appRain CMF · XSS or 'Cross-site Scripting'
Affects appRain CMFSource CVE Database V5
Not known to be exploited · CVSS 5.1 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:P/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 vulnerable endpoint to trusted users only and monitoring for suspicious activity related to email template management.
- Implement strict input validation and output encoding on the affected parameters ('data[Option][message]', 'data[Option][subject]', 'data[Option][templatetype]') to neutralize any malicious scripts.
- Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers.
- Conduct thorough code reviews and security testing (including automated scanning and manual penetration testing) on the appRain CMF application to identify and remediate similar input validation issues.
- Educate users and administrators about the risks of XSS and encourage strong authentication practices to reduce the risk of account compromise.
- Stay alert for official patches or updates from appRain and apply them promptly once available.
- 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[Option][message]', 'data[Option][subject]' and 'data[Option][templatetype]' parameters in /apprain/information/manage/emailtemplate/add.