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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00201.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cotonti Cotonti unaffected
Version Status Constraints
0 affected ≤ 1.0.0

No data.

No data.

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Vendors Products
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Project Subscriptions

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Cotonti Siena Subscribe
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/Cotonti/Cotonti cve-icon cve-icon
https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/search/search.header.php cve-icon cve-icon
https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/search/search.page.first.php cve-icon cve-icon
https://github.com/Cotonti/Cotonti/issues/1907 cve-icon cve-icon
https://github.com/Cotonti/Cotonti/pull/1908 cve-icon cve-icon
https://www.vulncheck.com/advisories/cotonti-through-1.0.0-reflected-xss-via-search-highlight-parameter cve-icon cve-icon
History

Tue, 29 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Sat, 26 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
First Time appeared Cotonti cotonti
Cotonti siena
Vendors & Products Cotonti cotonti
Cotonti siena

Sat, 26 Sep 2026 01:15:00 +0000

Type Values Removed Values Added
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.
Title Cotonti through 1.0.0 Reflected XSS via search highlight parameter
First Time appeared Cotonti
Cotonti cotonti Siena
Weaknesses CWE-79
CPEs cpe:2.3:a:cotonti:cotonti_siena:*:*:*:*:*:*:*:*
Vendors & Products Cotonti
Cotonti cotonti Siena
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-29T17:22:25.279Z

Reserved: 2026-09-26T00:48:19.451Z

Link: CVE-2026-100521

cve-icon Vulnrichment

Updated: 2026-09-29T17:21:45.953Z

cve-icon NVD

Status : Deferred

Published: 2026-09-26T01:17:00.517

Modified: 2026-09-29T18:17:05.373

Link: CVE-2026-100521

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-26T13:30:10Z

Weaknesses