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CVE-2026-61607
4.6 MEDIUM
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): Low (L)
- User Interaction (UI): Required (R)
- Scope (S): Unchanged (U)
- Confidentiality (C): Low (L)
- Integrity (I): Low (L)
- Availability (A): None (N)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): Required (R)
- Modified Confidentiality (MC): Low (L)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): Low (L)
- Modified Availability (MA): None (N)
Activity log
- Created & dismissed (no matching packages found) suggestion
Grav API Plugin: Stored XSS via SVG Upload - API Media Pipeline Bypasses Sanitizer
Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content. Prior to 1.0.2, the Grav API plugin POST /api/v1/media pipeline in HandlesMediaUploads::processUploadedFile() validates an SVG filename extension but does not invoke Security::sanitizeSVG(). An attacker with api.media.write permission can store an SVG containing JavaScript, and the server returns the file as Content-Type: image/svg+xml so the script executes when a victim opens it, allowing session data theft and authenticated actions. This issue is fixed in version 1.0.2.
References
-
https://github.com/getgrav/grav/security/advisories/GHSA-7vhm-8x52-2r5p x_refsource_CONFIRM
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https://github.com/getgrav/grav-plugin-api/releases/tag/1.0.2 x_refsource_MISC
Affected products
grav-plugin-api
- ==< 1.0.2