What is CVE-2020-8966?

CVE-2020-8966 is a medium-severity vulnerability in Tiki Tikiwiki Cms\/groupware, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 6.5/10. Published 2020-04-01.

How severe is CVE-2020-8966?

Medium severity. CVSS v3 base score is 6.5 out of 10.

XSS in Tiki Tikiwiki Cms\/groupware

CVE-2020-8966

There is an Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in php webpages of Tiki-Wiki Groupware. Tiki-Wiki CMS all versions through 20.0 allows malicious users to cause the injection of malicious code fragments (scripts) into a legitimate web page.

Published 2020-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Tiki Tikiwiki Cms\/groupware
Tiki-Wiki Groupware Cms — versions through 20.0

Weakness classification (CWE)

References

www.incibe-cert.es/en/early-warning/security-advisories/cross-site-scripting-xs… (Third Party Advisory)
sourceforge.net/p/tikiwiki/code/75455 (Patch)

Frequently asked questions

What is CVE-2020-8966?: CVE-2020-8966 is a medium-severity vulnerability in Tiki Tikiwiki Cms\/groupware, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 6.5/10. Published 2020-04-01.
How severe is CVE-2020-8966?: Medium severity. CVSS v3 base score is 6.5 out of 10.