CVE-2026-100521

5.1 mediumEPSS 0.2%

Medium (5.1). EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

5.1 medium

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS 3.1

6.1 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 9% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-09-26
Modified: 2026-09-29
Record from: the NVD, synced 2026-10-19

References

https://github.com/Cotonti/Cotonti
https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/search/search.header.php
https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/search/search.page.first.php
https://github.com/Cotonti/Cotonti/issues/1907
https://github.com/Cotonti/Cotonti/pull/1908

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