CVE-2020-37237

MEDIUM

Composr CMS 10.0.34 Persistent Cross-Site Scripting via banners

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-37237. PoCs published by Parshwa Bhavsar.

AI-analyzed exploit summary This is a technical writeup describing a persistent XSS vulnerability in Composr CMS 10.0.34. The vulnerability allows an attacker to inject malicious JavaScript into the 'Description' field of a banner, which executes when users visit the website.

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.

Exploits (1)

exploitdb WRITEUP
by Parshwa Bhavsar · textwebappsphp
https://www.exploit-db.com/exploits/49190

This is a technical writeup describing a persistent XSS vulnerability in Composr CMS 10.0.34. The vulnerability allows an attacker to inject malicious JavaScript into the 'Description' field of a banner, which executes when users visit the website.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Composr CMS 10.0.34
Auth required
Prerequisites: admin credentials · access to the CMS admin panel
devstral-2 · analyzed May 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit exploit
ExploitDB-49190
https://www.exploit-db.com/exploits/49190
Product product
Official Product Homepage
https://compo.sr/
Product product
Product Reference
https://compo.sr/download.htm
Third Party Advisory third-party-advisory
VulnCheck Advisory: Composr CMS 10.0.34 Persistent Cross-Site Scripting via banners
https://www.vulncheck.com/advisories/composr-cms-persistent-cross-site-scripting-via-banners

Scores

CVSS v3 6.4
EPSS 0.0024
EPSS Percentile 14.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
Compo/Composr CMS 10.0.34
Published May 16, 2026
Tracked Since May 16, 2026