Description
Grav CMS 2.0.10 contains a path traversal vulnerability in ImageMedium::watermark(), which passes its unsanitized $image argument to RocketTheme\Toolbox\ResourceLocator\UniformResourceLocator::findResource(). Because the file:// scheme branch only lexically collapses '..' segments without a realpath/containment check, an editor authoring Markdown image syntax with traversal sequences can cause arbitrary image files outside Grav's media sandbox to be composited into a carrier image, which is then cached and served from a public, unauthenticated URL — disclosing those files to anonymous visitors.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
getgrav grav
Default version status: unaffected
0 to < 2.0.11affected2.0.11unaffected
pkg:composer/getgrav/gravReferences
- https://github.com/getgrav/grav/security/advisories/GHSA-w3f4-8pj2-599w ↗
- https://github.com/getgrav/grav/commit/db8c1fcd63aaaf6d6b244bc6b4cfa5f7b96bbc7f ↗
- https://github.com/getgrav/grav/commit/c569a53304cd7d95ff21bffa6fc590adcf0be83d ↗
- https://github.com/getgrav/grav/commit/b282200a65ce979377963180629babd2335212ba ↗
- https://www.vulncheck.com/advisories/grav-cms-before-path-traversal-via-watermark ↗