GHSA-fmg2-f5r9-24qc
GHSA-fmg2-f5r9-24qc is a remote code execution vulnerability in getgrav/grav. O3 Security confirms whether GHSA-fmg2-f5r9-24qc is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Grav: Stored XSS via page title (data[header][title]) in admin panel
Blast Radius
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Description
Summary
A Stored Cross-Site Scripting (XSS) vulnerability was identified in the /admin/pages/[page] endpoint of the Grav application. This vulnerability allows attackers to inject malicious scripts into the data[header][title] parameter.
Details
Vulnerable Endpoint: GET /admin/pages/[page] Parameter: data[header][title]
The application fails to properly validate and sanitize user input in the data[header][title] parameter. As a result, attackers can craft a malicious URL with an XSS payload. When this URL is accessed, the injected script is reflected back in the HTTP response and executed within the context of the victim's browser session.
PoC
Payload: <img src=1 onerror=alert(1)>
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Log in to the Grav Admin Panel and navigate to Pages.
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Create a new page or edit an existing one.
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Edit title of the page to
<img src=1 onerror=alert(1)>
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Save page
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Open the move function and click on the folder having the payload
Impact
Stored cross-site scripting (XSS) attacks can have serious consequences, including:
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User actions: Attackers can perform actions on behalf of the user
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Data theft: Sensitive information such as session cookies can be stolen
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Account compromise: Attackers may impersonate legitimate users
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Malicious code execution: Arbitrary JavaScript code can run in the user’s browser
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Website defacement or misinformation: Malicious output may be injected visually
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User redirection: Victims may be redirected to phishing or malicious websites
By Vu Duc Hieu Contributor Simon Tran
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | getgrav/grav | all versions | 1.7.49.5 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for getgrav/grav. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update getgrav/grav to 1.7.49.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fmg2-f5r9-24qc is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-fmg2-f5r9-24qc is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-fmg2-f5r9-24qc. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-fmg2-f5r9-24qc in your dependencies?
O3 detects GHSA-fmg2-f5r9-24qc across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.