{"id":"CVE-2023-41318","aliases":["GHSA-5crw-6j7v-xc72","GO-2023-2053"],"title":"matrix-media-repo: Unsafe media served inline on download endpoints","summary":"matrix-media-repo: Unsafe media served inline on download endpoints","severity":"medium","cvss":4.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N","vendor":"turt2live","product":"github.com/turt2live/matrix-media-repo","ecosystem":"go","affected":["github.com/turt2live/matrix-media-repo < 1.3.0"],"patched":["github.com/turt2live/matrix-media-repo 1.3.0"],"published":"2023-09-08","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:49:57.874197523Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-5crw-6j7v-xc72","references":[{"url":"https://github.com/turt2live/matrix-media-repo/security/advisories/GHSA-5crw-6j7v-xc72"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-41318"},{"url":"https://github.com/turt2live/matrix-media-repo/commit/77ec2354e8f46d5ef149d1dcaf25f51c04149137"},{"url":"https://github.com/turt2live/matrix-media-repo/commit/bf8abdd7a5371118e280c65a8e0ec2b2e9bdaf59"},{"url":"https://developer.mozilla.org/en-US/docs/Web/SVG/Element/script"},{"url":"https://github.com/turt2live/matrix-media-repo"}],"tags":["osv","go"],"epss":0.00516,"epssPercentile":0.4279,"ingestedAt":"2026-09-12T03:13:01.755Z","slug":"CVE-2023-41318","body":"## Overview\n\n### Impact\nA malicious user can upload an SVG image containing JavaScript to their server. When matrix-media-repo is asked to serve that media via the `/_matrix/media/(r0|v3)/download` endpoint, it would be served with a `Content-Disposition` of `inline`. This can allow JavaScript to run in the browser if a client links to the `/download` endpoint directly.\n\nServer operators which do not share a domain between matrix-media-repo and other services are not affected, but are encouraged to upgrade regardless.\n\n### Patches\nhttps://github.com/turt2live/matrix-media-repo/commit/77ec2354e8f46d5ef149d1dcaf25f51c04149137 and https://github.com/turt2live/matrix-media-repo/commit/bf8abdd7a5371118e280c65a8e0ec2b2e9bdaf59 fix the issue. Operators should upgrade to v1.3.0 as soon as possible.\n\n### Workarounds\nThe `Content-Disposition` header can be overridden by the reverse proxy in front of matrix-media-repo to always use `attachment`, defeating this issue at the cost of \"worse\" user experience when clicking download links.\n\n### References\nhttps://developer.mozilla.org/en-US/docs/Web/SVG/Element/script\n\n\n\n## Affected packages\n\n- `github.com/turt2live/matrix-media-repo < 1.3.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/turt2live/matrix-media-repo 1.3.0`","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":22.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}