What is CVE-2020-16131?

CVE-2020-16131 is a medium-severity vulnerability in Tiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-08-03.

How severe is CVE-2020-16131?

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

XSS in Tiki

CVE-2020-16131

Tiki before 21.2 allows XSS because [\s\/"\'] is not properly considered in lib/core/TikiFilter/PreventXss.php.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-08-03 · 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: 0.007 (50.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Tiki

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

gitlab.com/tikiwiki/tiki/-/commit/d12d6ea7b025d3b3f81c8a71063fe9f89e0c4bf1 (Third Party Advisory)
tiki.org/News (Vendor Advisory)

Frequently asked questions

What is CVE-2020-16131?: CVE-2020-16131 is a medium-severity vulnerability in Tiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-08-03.
How severe is CVE-2020-16131?: Medium severity. CVSS v3 base score is 6.1 out of 10.