Vulnerability · Published May 16, 2026 · Assigned by VulnCheck
CVE-2020-37237Composr CMS 10.0.34 Persistent Cross-Site Scripting via banners
Medium 6.4
In plain English
A medium-severity cross-site scripting in Composr CMS from Compo. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Severity (CVSS 3.1)6.4Medium
Exploit odds (30 days)0.2%top 84.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Composr CMS 10.0.34 contains a persistent cross-site scripting vulnerability that allows authenticated administrators to inject malicious scripts through the banner management interface. Attackers with admin credentials can inject XSS payloads in the Description field of the Add banner functionality, which execute for all website visitors when they access the home page.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Compo | Composr CMS | 10.0.34 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
References
- ExploitDB-49190 exploit
- Official Product Homepage product
- Product Reference product
- VulnCheck Advisory: Composr CMS 10.0.34 Persistent Cross-Site Scripting via banners third-party-advisory