Medium 6.1Published Sep 26, 2026

CVE-2026-100522Cotonti through 1.0.0 Reflected XSS via message.php lng parameter

Updated under an hour ago (2026-10-19 07:00 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for Cotonti

Exploited in the last 30 days

Cotonti through 1.0.0 contains a reflected cross-site scripting vulnerability in message.php where the lng parameter is not properly escaped before output in the confirmation dialog. Unauthenticated attackers can craft malicious links with script payloads in the lng parameter to execute arbitrary JavaScript in victim browser sessions.

CVSS: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Sep 28, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Cotonti Cotonti cotonti:cotonti (from the name)	through 1.0.0	CNA record

References

https://github.com/Cotonti/Cotonti/issues/1907issue-tracking
https://github.com/Cotonti/Cotonti/pull/1908issue-tracking, patch
https://github.com/Cotonti/Cotonti/blob/1.0.0/message.phptechnical-description
https://github.com/Cotonti/Cotontiproduct
https://www.vulncheck.com/advisories/cotonti-through-1.0.0-reflected-xss-via-message-php-lng-parameterthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.