How severe is CVE-2020-8966?

CVE-2020-8966 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-8966 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8966?

CVE-2020-8966 affects Tiki Tikiwiki Cms/groupware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8966?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-8966 published?

CVE-2020-8966 was published on 2020-04-01 and last updated on 2026-06-17.

CVE-2020-8966

CVE-2020-8966 is a medium-severity vulnerability in Tiki Tikiwiki Cms/groupware with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Tiki Tikiwiki Cms/groupware
Published: 2020-04-01
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2020-8966?: CVE-2020-8966 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-8966 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8966?: CVE-2020-8966 affects Tiki Tikiwiki Cms/groupware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8966?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-8966 published?: CVE-2020-8966 was published on 2020-04-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tiki:tikiwiki_cms\/groupware:*:*:*:*:*:*:*:*

More vulnerabilities in Tiki Tikiwiki Cms/groupware

CVE-2008-3653 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in TikiWiki CMS/Groupware before 2.0 have unknown impact and attack vectors.
CVE-2007-6529 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in TikiWiki before 1.9.9 have unknown impact and attack vectors involving (1)…
CVE-2025-34111 — Critical (CVSS 9.8): An unauthenticated arbitrary file upload vulnerability exists in Tiki Wiki CMS Groupware version 15.1 and earlier via…
CVE-2010-4239 — Critical (CVSS 9.8): Tiki Wiki CMS Groupware 5.2 has Local File Inclusion
CVE-2012-0911 — Critical (CVSS 9.8): TikiWiki CMS/Groupware before 6.7 LTS and before 8.4 allows remote attackers to execute arbitrary PHP code via a…
CVE-2020-29254 — High (CVSS 8.8): TikiWiki 21.2 allows templates to be edited without CSRF protection. This could allow an unauthenticated, remote…

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Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

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CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
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CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

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