GHSA-7g78-5g5g-mvfj
Suggest an improvement- Source
- https://github.com/advisories/GHSA-7g78-5g5g-mvfj
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/12/GHSA-7g78-5g5g-mvfj/GHSA-7g78-5g5g-mvfj.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-7g78-5g5g-mvfj
- Aliases
- Published
- 2025-12-02T01:24:56Z
- Modified
- 2025-12-02T01:58:50.281767Z
- Severity
-
- 6.2 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H CVSS Calculator
- Summary
- Grav vulnerable to Cross-Site Scripting (XSS) Stored endpoint `/admin/pages/[page]` parameter `data[header][template]` in Advanced Tab
- Details
-
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 thedata[header][template]parameter. The script is saved within the page's frontmatter and executed automatically whenever the affected content is rendered in the administrative interface or frontend view.
Details
Vulnerable Endpoint:
POST /admin/pages/[page]
Parameter:data[header][template]The application fails to properly sanitize user input in the
data[header][template]field, which is stored in the YAML frontmatter of the page. An attacker can inject JavaScript code using this field, and the payload is rendered and executed when the page is accessed, especially within the Admin Panel interface.
PoC
Payload:
<script>alert('PoC-XXS73')</script>Steps to Reproduce:
Log in to the Grav Admin Panel and navigate to Pages.
Create a new page or edit an existing one.
In the Advanced > Template field (which maps to
data[header][template]), insert the payload:Save the page.
Return to the Pages section and click on the three-dot menu of the affected page:
The stored XSS payload is triggered, and the script is executed in the browser:
Impact
Stored XSS vulnerabilities can have serious consequences, including:
Session hijacking: Capturing admin session cookies or tokens
Malware delivery: Executing scripts that load malicious resources
Credential theft: Creating fake login prompts to steal usernames/passwords
Data exposure: Reading sensitive metadata or page contents
Privilege escalation: Performing actions as an authenticated user
Website defacement: Altering visual or functional elements of the site
Reputation damage: Undermining user trust in the application
by CVE-Hunters
- Database specific
{ "severity": "MODERATE", "github_reviewed": true, "cwe_ids": [ "CWE-79" ], "github_reviewed_at": "2025-12-02T01:24:56Z", "nvd_published_at": "2025-12-01T22:15:51Z" }- References
Affected packages
Packagist / getgrav/grav
Package
- Name
- getgrav/grav
- Purl
- pkg:composer/getgrav/grav
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.8.0-beta.27