What is CVE-2020-23977?

CVE-2020-23977 is a medium-severity vulnerability in Kandnconcepts Club Cms Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-08-27.

How severe is CVE-2020-23977?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Kandnconcepts Club Cms Project

CVE-2020-23977

KandNconcepts Club CMS 1.1 and 1.2 has cross site scripting via the 'team.php,player.php,club.php' id parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-08-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.4th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Kandnconcepts Club Cms Project — versions 1.1, 1.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

packetstormsecurity.com/files/157049/KandNconcepts-Club-CMS-1.1-1.2-Cross-Site-… (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2020-23977?: CVE-2020-23977 is a medium-severity vulnerability in Kandnconcepts Club Cms Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-08-27.
How severe is CVE-2020-23977?: Medium severity. CVSS v3 base score is 6.1 out of 10.