CVE-2025-40730: Vox Media Chorus CMS · XSS or 'Cross-site Scripting'
Affects Vox Media Chorus CMSSource CVE Database V5
Not known to be exploited · CVSS 4.8 Medium.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 24% 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:N/SI:L/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 28 Jul 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 |
|---|---|---|
| Vox Media Chorus CMS | Affected
| Fixed in– |
AI-suggested
Given the absence of an official patch, European organizations should implement immediate mitigations to reduce exposure. These include: 1) Implement strict input validation and output encoding on the 'q' parameter in the '/search' endpoint to neutralize malicious scripts. 2) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 3) Use HTTP-only and Secure flags on cookies to prevent theft via client-side scripts. 4) Educate users to avoid clicking suspicious or unsolicited URLs related to the affected service. 5) Monitor web logs for unusual query parameter patterns indicative of exploitation attempts. 6) If possible, temporarily disable or restrict the vulnerable search functionality until a patch is available. 7) Engage with Vox Media for updates and apply patches promptly once released. 8) Conduct regular security assessments and penetration testing focusing on input handling in web applications.
Description
HTML injection in Vox Media's Chorus CMS. This vulnerability allows an attacker to execute JavaScript code in the victim's browser by sending them a malicious URL using the 'q' parameter in '/search'. This vulnerability can be exploited to steal sensitive user data, such as session cookies, or to perform actions on behalf of the user.