References to Advisories, Solutions, and Tools

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Change History

Grav CMS before 2.0.16 contains an origin validation bypass in the Uri::referrer() and Pages::referrerRoute() methods, which validate the Referer header using an unanchored string prefix match (str_starts_with($referrer, $base)) with no trailing delimiter. An attacker who controls a domain that begins with the victim site's origin (e.g. https://example.com.attacker.tld) can send a request with such a Referer to be treated as same-origin, bypassing the Referer-based origin check.

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CWE-346

https://github.com/getgrav/grav/security/advisories/GHSA-9ccq-2jfg-qw33

https://www.vulncheck.com/advisories/grav-cms-before-origin-validation-bypass-via-referer

[{"vendor":"getgrav","product":"grav","defaultStatus":"unaffected","versions":[{"version":"0","lessThan":"2.0.16","versionType":"semver","status":"affected"},{"version":"2.0.16","versionType":"semver","status":"unaffected"}]}]