Vulnerability details

CVE-2026-75832

getgrav grav

Grav API Plugin before 1.0.14 Authorization Bypass

CVSS 4.0

9.3Critical

Official description

The Grav API plugin (getgrav/grav-plugin-api, bundled with Grav 2.0) before version 1.0.14 (fixed in 1.0.15) contains a missing authorization vulnerability in BlueprintPathResolver::resolveUserScope(). The method gates the users/<name> scope on the account's raw super-admin ACL flag (access.api.super) instead of validating the presented API key's actual scope. An attacker holding an API key scoped only to api.media.write minted on a super-admin account can bypass the authorization check and, via POST /blueprint-upload or GET /blueprint-files, write a file into another user's scope (in the shared user/accounts/ directory, constrained to image extensions by assertSafeExtension()) and browse that scope's file listing, despite the key not being granted api.users.write.

CVSS scores

Score	Version	Source	Vector
9.3Critical	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`
4.3Medium	3.1	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N`

Affected products

Vendor	Product	Versions	Source
getgrav	grav	v < 1.0.14	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/getgrav/grav/security/advisories/GHSA-435x-66r2-jwv2 vendor-advisory
https://www.vulncheck.com/advisories/grav-api-plugin-before-authorization-bypass third-party-advisory

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Details

Published: 2026-08-18
Last updated: 2026-08-19
State: Published
Assigner (CNA): VulnCheck

Exploit prediction (EPSS)

0.29%

Probability of exploitation in 30 days

22.5%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Partial

Weaknesses (CWE)

CWE-862
Missing Authorization