CVE-2021-29439
By installing the right plugin, an attacker can obtain an arbitrary code execution primitive and elevate their privileges on the instance.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.59%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The Grav admin plugin prior to version 1.10.11 does not correctly verify caller's privileges. As a consequence, users with the permission `admin.login` can install third-party plugins and their dependencies. By installing the right plugin, an attacker can obtain an arbitrary code execution primitive and elevate their privileges on the instance. The vulnerability has been addressed in version 1.10.11. As a mitigation blocking access to the `/admin` path from untrusted sources will reduce the probability of exploitation.
- CVSS 3.1
- 7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.59% probability · 85th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Affected
- getgrav/grav admin
- Source
- security-advisories@github.com
EPSS 2.6% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/getgrav/grav-plugin-admin/commit/a220359877fd1281f76ba732e5308e0e3002e4b1
- https://github.com/getgrav/grav-plugin-admin/security/advisories/GHSA-wg37-cf5x-55hqThird Party Advisory
- https://github.com/getgrav/grav-plugin-admin/commit/a220359877fd1281f76ba732e5308e0e3002e4b1
- https://github.com/getgrav/grav-plugin-admin/security/advisories/GHSA-wg37-cf5x-55hqThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.