XSS in Compo Composr Cms
CVE-2020-37237
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (13.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 13.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Compo Composr Cms — versions 10.0.34
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49190 (exploit)
- compo.sr/ (product)
- compo.sr/download.htm (product)
- www.vulncheck.com/advisories/composr-cms-persistent-cross-site-scripting-via-ba… (third-party-advisory)
Frequently asked questions
- What is CVE-2020-37237?
- CVE-2020-37237 is a medium-severity vulnerability in Compo Composr Cms, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-05-16.
- How severe is CVE-2020-37237?
- Medium severity. CVSS v3 base score is 6.4 out of 10.