CVE-2026-116202: YesWiki before 4.7.0 Stored XSS via ImageField SVG Upload

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-25 · updated 2026-10-29
Weakness: CWE-79

Description

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.

Affected products

yeswiki: before 4.7.0 — fixed in 4.7.0

How to fix

Upgrade to a fixed version: yeswiki 4.7.0. Check the vendor advisory for mitigations.

References

https://github.com/YesWiki/yeswiki/security/advisories/GHSA-c5q6-7233-3v6g
https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-stored-xss-via-imagefield-svg-upload
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-c5q6-7233-3v6g

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