---
id: CVE-2026-104465
title: >-
  YesWiki before 4.6.7 contains a reflected cross-site scripting vulnerability
  that allows unauthenticated attackers to inject scripts via the field
  parameter of the mail handler
summary: >-
  YesWiki before 4.6.7 contains a reflected cross-site scripting vulnerability
  that allows unauthenticated attackers to inject scripts via the field
  parameter of the mail handler. Attackers can craft links whose field value
  breaks out of t…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: YesWiki
product: yeswiki
affected:
  - yeswiki < 4.6.7
published: '2026-10-02'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T17:17:13.170'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104465'
references:
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-2fc6-rvp3-fgfj'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-reflected-xss-via-field-parameter-in-mail-handler
    label: disclosure@vulncheck.com
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-2fc6-rvp3-fgfj'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00212
epssPercentile: 0.11435
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-06T16:18:30.992255Z'
ingestedAt: '2026-10-02T12:17:44.345Z'
---

## Overview

YesWiki before 4.6.7 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts via the field parameter of the mail handler. Attackers can craft links whose field value breaks out of the ajax-mail-form action attribute to execute JavaScript in victims' browsers.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.