---
id: CVE-2026-116823
title: YesWiki before 4.7.0 Reflected XSS via BazarField $_REQUEST Fallback
summary: >-
  YesWiki before 4.7.0 contains a reflected cross-site scripting vulnerability
  that allows unauthenticated attackers to inject JavaScript by supplying query
  parameters matching missing Bazar field names. Attackers can craft links where
  Baz…
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'
cvssSource: cna
cwe:
  - CWE-79
vendor: YesWiki
product: yeswiki
affected:
  - yeswiki < 4.7.0
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T23:05:49.182Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116823'
references:
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-hcvp-q8fx-84mc'
    label: GitHub Security Advisory (GHSA-hcvp-q8fx-84mc)
  - url: >-
      https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-reflected-xss-via-bazarfield-request-fallback
    label: >-
      VulnCheck Advisory: YesWiki before 4.7.0 Reflected XSS via BazarField
      $_REQUEST Fallback
tags:
  - cve.org
epss: 0.00179
epssPercentile: 0.07393
ingestedAt: '2026-10-27T16:11:59.147Z'
---

## Overview

YesWiki before 4.7.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject JavaScript by supplying query parameters matching missing Bazar field names. Attackers can craft links where BazarField::getValue() falls back to unsanitized $_REQUEST values rendered via Twig |raw templates, performing same-origin authenticated actions in victims' sessions.

## Affected

- `yeswiki < 4.7.0`

## Remediation

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