CVE-2020-37237

5.1 mediumEPSS 0.2%

Medium (5.1). EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

5.1 medium

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS 3.1

6.4 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 15% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-05-16
Modified: 2026-09-29
Record from: the NVD, synced 2026-10-19

References

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

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