XSS in Php-Fusion Phpfusion

CVE-2020-36996

PHPFusion 9.03.50 contains a persistent cross-site scripting vulnerability in the print.php page that fails to properly sanitize user-submitted message content. Attackers can inject malicious JavaScript through forum messages that will execute when the print page is generated, allowing script execution in victim browsers.

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: 0.003 (16.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2020-36996: held from 0.002 to 0.003.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2020-36996?
CVE-2020-36996 is a medium-severity vulnerability in Php-Fusion Phpfusion, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-01-30.
How severe is CVE-2020-36996?
Medium severity. CVSS v3 base score is 6.4 out of 10.