Vulnerability · Published Aug 21, 2026 · Assigned by GitHub_M

CVE-2026-53468Typemill has Stored HTML Attribute Injection in Metadata Fields

Medium 4.6

In plain English

A medium-severity cross-site scripting in typemill from typemill. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.

Severity (CVSS 3.1)4.6Medium

Exploit odds (30 days)0.4%top 63.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack tooling1Nuclei

Official description

Typemill is a flat-file, Markdown-based content management system designed for informational documentation websites. Versions prior to 2.23.0 are vulnerable to stored HTML attribute injection in the page metadata fields (`og:title` and `og:description`). An authenticated user with permission to modify page metadata can inject arbitrary HTML attributes into generated `<meta>` tags due to missing output encoding. Under certain browser or DOM interaction scenarios, this may lead to stored cross-site scripting (XSS). Version 2.23.0 fixes the issue.

Affected products (as reported)

Vendor	Product	Versions
typemill	typemill	< 2.23.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

References

https://github.com/typemill/typemill/security/advisories/GHSA-wg6r-jwmr-p7gr x_refsource_CONFIRM
https://github.com/typemill/typemill/releases/tag/v2.23.0 x_refsource_MISC