Stored XSS via raw option-label rendering
Published Aug 14, 2026 · Updated Aug 14, 2026
Stored XSS in the Grav Form plugin before 9.1.15 allows remote authenticated users to execute script in form viewers' browsers. The radio.html.twig and toggle.html.twig templates pass author-controlled option labels through Twig's raw filter instead of escaping HTML. Form-authoring access is required; a stored payload runs when visitors or administrators view the affected form, enabling browser-context data access or actions.
Summary
What happened
Stored XSS in the Grav Form plugin before 9.1.15 allows remote authenticated users to execute script in form viewers' browsers. The radio.html.twig and toggle.html.twig templates pass author-controlled option labels through Twig's raw filter instead of escaping HTML. Form-authoring access is required; a stored payload runs when visitors or administrators view the affected form, enabling browser-context data access or actions.
The record
- CVE
- CVE-2026-72821
- Published
- Aug 14, 2026
- Updated
- Aug 14, 2026
- Vendor
- GetGrav
- Product
- Grav
- Classifications
- CWE-79, T1189
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 14, 2026CVE publishedPublication date reported by the CVE source.
- Aug 14, 2026Record 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 <9.1.15
What conditions does exploitation require?
What is affected?
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
- Upstream radio and toggle stored-XSS verification scriptfunctional · demonstrated
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Technologies
Your stack
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Your stack
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