CVE-2020-37237CWE-79cross-site-scripting

CVE-2020-37237

Medium · published May 16, 2026

CVSS v3.1

6.4

EPSS

Percentile

14.1

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 6.4 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0: Not supplied
EPSS: 0.00239 · 14.1th percentile
Weakness: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published: 2026-05-16T20:16Z

References (4)

https://compo.sr/ · [email protected]https://compo.sr/download.htm · [email protected]https://www.exploit-db.com/exploits/49190 · [email protected]https://www.vulncheck.com/advisories/composr-cms-persistent-cross-site-scripting-via-banners · [email protected]

EPSS history

Timeline

16 MAY 15:25Z
Composr CMS 10.0.34 Persistent Cross-Site Scripting via banners
cvelistv5