TI-2026-64682 Aliases CVE-2026-100521 GHSA-9chp-6f7w-99jg

Cotonti through 1.0.0 Reflected XSS via search highlight parameter

LOW 23CWE-79Published 2026-09-26 · Updated 2026-09-29

Key facts

Attack vector: Network
Privileges required: None
User interaction: Active
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: None · None · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00201 9th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cotonti	Cotonti	up to 1.0.0	—	No fix listed	CNA

Cotonti VendorCotonti Affected up to 1.0.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-100521
2026-10-03 Alias added: GHSA-9chp-6f7w-99jg

References

Patch 1

https://github.com/Cotonti/Cotonti/pull/1908

Other 4

TI-2026-62074 Cotonti 1.0.0 Comments Plugin PHP Object Injection via ci Parameter CVSS 4.0CRITICAL 9.3
TI-2026-63195 Cotonti through 1.0.0 Predictable Password Recovery Token via Weak PRNG CVSS 4.0CRITICAL 9.2
TI-2026-41862 Cotonti Siena 0.9.26 CSRF via admin.php Config Update Endpoint CVSS 4.0HIGH 8.7
TI-2026-84359 Predictable tokens in Cotonti let attackers bypass email verification CVSS 4.0MEDIUM 6.3
TI-2025-28591 A vulnerability has been found in Cotonti Siena v0.9.25. CVSS 3.1MEDIUM 5.4
TI-2024-16007 A stored cross-site scripting (XSS) vulnerability in the Edit Page function of Cotonti… CVSS 3.1MEDIUM 5.4

See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences