CVE-2021-36551 Cross-site scripting in n/a
Attackers can execute arbitrary scripts in TikiWiki via the Add Event module, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-36551?
CVE-2021-36551 is a medium-severity cross-site scripting vulnerability in Tiki Tikiwiki Cms\/Groupware, published on 28 Oct 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
TikiWiki v21.4 was discovered to contain a cross-site scripting (XSS) vulnerability in the component tiki-calendar.php. This vulnerability allows attackers to execute arbitrary web scripts or HTML via a crafted payload under the Add Event module.
Weakness: CWE-79
Which versions are affected by CVE-2021-36551?
It affects 1 product.
Products include Tiki Tikiwiki Cms\/Groupware.
How do I fix CVE-2021-36551?
No fix has been published for CVE-2021-36551 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-36551 being exploited?
There is no known exploitation of CVE-2021-36551 in the wild and no public exploit code.
Other vulnerabilities in Tiki Tikiwiki Cms\/Groupware
- CVE-2008-3653 Multiple unspecified vulnerabilities in TikiWiki CMS/Groupware before 2.0 have unknown impact and attack vectors.
- CVE-2007-6529 Other in n/a
- CVE-2010-4239 Path traversal in CMS Groupware
- CVE-2012-0911 Deserialization in n/a
- CVE-2025-34111 Tiki Wiki <= 15.1 ELFinder Unauthenticated File Upload RCE
Sources
Also known as GHSA-qc2r-j24r-r6qm.