Vulnerability · Published Sep 26, 2026 · Assigned by VulnCheck
CVE-2026-100521Cotonti through 1.0.0 Reflected XSS via search highlight parameter
Medium 6.1
In plain English
A medium-severity cross-site scripting in Cotonti from Cotonti. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.2%top 90.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Cotonti through 1.0.0 contains a reflected cross-site scripting vulnerability in the search plugin highlight parameter that performs no HTML or JavaScript escaping. Attackers can craft malicious links with injected JavaScript in the highlight parameter that executes in the browser of any visitor who opens the link, including administrators.
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
References
- https://github.com/Cotonti/Cotonti/issues/1907 issue-tracking
- https://github.com/Cotonti/Cotonti/pull/1908 issue-tracking, patch
- https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/search/search.header.php technical-description
- https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/search/search.page.first.php technical-description
- https://github.com/Cotonti/Cotonti product
- VulnCheck Advisory: Cotonti through 1.0.0 Reflected XSS via search highlight parameter third-party-advisory