---
cve: "CVE-2026-100521"
severity: "MEDIUM"
cvss: 5.1
epss: "0.2%"
vendor: "Cotonti"
kev: false
exploited: false
published: "2026-09-26 01:17:00"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-28T03:30:47+02:00"
---

# CVE-2026-100521

> 5.1 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-09-26 00:59:22
- CNA-CVSS: **5.1** (`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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |

## Patch verfügbar (OSV)

- 0d554e939a315e7f7f18fba3ca1132b80c6a1adb (Commit)

## Referenzen

- <https://github.com/Cotonti/Cotonti/issues/1907>
- <https://github.com/Cotonti/Cotonti/pull/1908>
- <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>
- <https://www.vulncheck.com/advisories/cotonti-through-1.0.0-reflected-xss-via-search-highlight-parameter>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-100521) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_