CVE-2026-57852
MEDIUMAuthentication Bypass via Null Short-Circuit in Grav CMS Scheduler Webhook Token Check
Title source: cnaDescription
Grav CMS scheduler-webhook plugin contains an authentication bypass vulnerability that allows unauthenticated remote attackers to trigger configured scheduled jobs by exploiting a short-circuit logic flaw in the webhook token validation. Attackers can send a single unauthenticated POST request to the scheduler webhook endpoint to execute all configured scheduled jobs or target a specific job, causing unintended execution of operator-defined commands under the web server process user.
References (3)
Core 3
Core References
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/authentication-bypass-via-null-short-circuit-in-grav-cms-scheduler-webhook-token-check
vendor-advisory
GitHub Security Advisory
https://github.com/getgrav/grav/security/advisories/GHSA-xwv3-2mv2-w33x
Scores
CVSS v3
5.6
EPSS
0.0042
EPSS Percentile
34.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-303
Status
published
Products (2)
Trilby Media/Grav CMS scheduler-webhook plugin
< 1.1.3
Trilby Media/Grav CMS scheduler-webhook plugin
< 2.0.8
Published
Jul 20, 2026
Tracked Since
Jul 21, 2026