Stored XSS via unfiltered Parsedown output
Published Sep 26, 2025 · Updated Sep 26, 2025
Stored XSS in Johannes Hoppe Markdown Shortcode 0.2.1 and earlier allows remote authenticated users to inject scripts through shortcode content. The markdown_shortcode function passes content through ParsedownExtra::text, wraps the resulting HTML, and returns it without wp_kses_post filtering. Contributor access is required; the scripts persist in published pages and execute in visitors' browsers.
Summary
What happened
Stored XSS in Johannes Hoppe Markdown Shortcode 0.2.1 and earlier allows remote authenticated users to inject scripts through shortcode content. The markdown_shortcode function passes content through ParsedownExtra::text, wraps the resulting HTML, and returns it without wp_kses_post filtering. Contributor access is required; the scripts persist in published pages and execute in visitors' browsers.
The record
- CVE
- CVE-2025-10180
- Published
- Sep 26, 2025
- Updated
- Sep 26, 2025
- Vendor
- Johannes Hoppe
- Product
- Markdown Shortcode
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 26, 2025CVE publishedPublication date reported by the CVE source.
- Sep 26, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=* <=0.2.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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