---
id: "CVE-2026-116202"
kind: "vulnerability"
aliases: ["CVE-2026-116202"]
title: "YesWiki: stored XSS via unsanitized SVG uploads in bazar image field"
severity: "medium"
cvss: 5.4
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "php", "self-hosted", "yeswiki"]
not_affected_if: ["no-untrusted-authors", "yeswiki-4.7.0-or-later"]
published_at: "2026-10-25T14:17:01+00:00"
first_seen_at: "2026-10-25T14:41:23+00:00"
updated_at: "2026-10-25T14:42:59+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116202", "first_seen_at": "2026-10-25T14:41:23+00:00"}]
---

# YesWiki: stored XSS via unsanitized SVG uploads in bazar image field

YesWiki versions before 4.7.0 accept SVG files through the bazar ImageField without sanitizing them. A low-privilege logged-in user can upload an SVG that runs script in the browser of anyone who views the entry or file.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed YesWiki version in the wiki's version file or admin footer; versions below `4.7.0` are affected
- Check whether accounts that can create or edit bazar entries include untrusted users

## Fix

- Upgrade YesWiki to `4.7.0` or later
- Until upgraded, restrict who can submit bazar entries with image fields

## Timeline

- 2026-10-25T14:41:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116202

## From the sources

YesWiki before 4.7.0 contains a stored cross-site scripting vulnerability that allows low-privilege authenticated users to upload unsanitized SVG files through the bazar ImageField class. Attackers can submit a malicious SVG via the image field of the entries API, which is served as image/svg+xml and executes script for users viewing the entry or file.

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