GHSA-g8wr-r2v2-vqc6

Source

https://github.com/advisories/GHSA-g8wr-r2v2-vqc6

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-g8wr-r2v2-vqc6/GHSA-g8wr-r2v2-vqc6.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-g8wr-r2v2-vqc6

Aliases

CVE-2026-54721

Published

2026-08-27T16:53:17Z

Modified

2026-08-27T17:10:36Z

Severity

8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

silverstripe/userforms vulnerable to remote code execution via userforms email subject

Details

Impact

The userform email subject field in the CMS is vulnerable to a specially crafted payload being used to run arbitrary code on the server.

Reported by

Jack Wallace from Bastion Security

Database specific

{
    "cwe_ids":  [
        "CWE-20",
        "CWE-94"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-08-27T16:53:17Z",
    "nvd_published_at":  null,
    "severity":  "HIGH"
}

References

Affected packages

Packagist / silverstripe/userforms

Package

Name: silverstripe/userforms
Purl: pkg:composer/silverstripe/userforms

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

6.4.9

Affected versions

0.*

0.5.1

1.*

1.0.1

1.1.0-beta

2.*

2.0.1-rc1

2.0.1

2.0.2

2.0.3

2.0.4

2.0.5

2.0.6

2.0.7

2.0.8

2.0.9

2.0.10

3.*

3.0.0-beta1

3.0.0

3.0.1

3.0.2

3.1.0

3.1.1

3.1.2

4.*

4.0.0

4.0.1

4.1.0

4.2.0

4.2.1

4.2.2

4.2.3

4.2.4

4.2.5

4.2.6

4.3.0

4.3.1

4.3.2

4.3.3

4.3.4

4.3.5

4.4.0

4.4.1

4.4.2

4.5.0

4.5.1

4.5.2

4.5.3

4.5.4

4.5.5

4.5.6

4.5.7

4.5.8

4.6.0

4.6.1

4.6.2

4.6.3

5.*

5.0.0-beta1

5.0.0-beta2

5.0.0

5.0.1

5.0.2

5.1.0

5.1.1

5.2.0

5.2.1

5.2.2

5.3.0

5.3.1

5.3.2

5.3.3

5.4.0

5.4.1

5.4.2

5.4.3

5.5.0

5.5.1

5.5.2

5.5.3

5.6.0-rc1

5.6.0

5.6.1

5.6.2

5.6.3

5.7.0

5.7.1

5.8.0

5.8.1

5.8.2

5.8.3

5.9.0-beta1

5.9.0-rc1

5.9.0

5.9.1

5.10.0-alpha1

5.10.0-beta1

5.10.0-rc1

5.10.0

5.11.0

5.11.1

5.12.0

5.12.1

5.12.2

5.13.0-beta1

5.13.0-rc1

5.13.0

5.13.1

5.13.2

5.13.3

5.13.4

5.14.0-beta1

5.14.0-rc1

5.14.0

5.14.1

5.14.2

5.14.3

5.15.0-beta1

5.15.0-rc1

5.15.0

5.15.1

5.15.2

5.15.3

5.15.4

5.15.5

5.15.6

5.15.7

5.15.8

5.15.9

5.15.10

5.15.11

v5.*

v5.9.2

6.*

6.0.0-beta1

6.0.0-rc1

6.0.0

6.0.1

6.0.2

6.0.3

6.0.4

6.0.5

6.0.6

6.0.7

6.0.8

6.1.0-beta1

6.1.0-rc1

6.1.0

6.1.1

6.1.2

6.2.0-beta1

6.2.0-rc1

6.2.0

6.2.1

6.2.2

6.2.3

6.2.4

6.2.5

6.2.6

6.2.7

6.2.8

6.2.9

6.2.10

6.3.0-beta1

6.3.0-rc1

6.3.0

6.3.1

6.3.2

6.4.0-beta1

6.4.0-rc1

6.4.0

6.4.1

6.4.2

6.4.3

6.4.4

6.4.5

6.4.6

6.4.7

6.4.8

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-g8wr-r2v2-vqc6/GHSA-g8wr-r2v2-vqc6.json"

Packagist / silverstripe/userforms

Package

Name: silverstripe/userforms
Purl: pkg:composer/silverstripe/userforms

Affected ranges

Type: ECOSYSTEM
Events: Introduced

7.0.0

Fixed

7.0.7

Affected versions

7.*

7.0.0

7.0.1

7.0.2

7.0.3

7.0.4

7.0.5

7.0.6

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-g8wr-r2v2-vqc6/GHSA-g8wr-r2v2-vqc6.json"

Packagist / silverstripe/userforms

Package

Name: silverstripe/userforms
Purl: pkg:composer/silverstripe/userforms

Affected ranges

Type: ECOSYSTEM
Events: Introduced

7.1.0

Fixed

7.1.1

Affected versions

7.*

7.1.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-g8wr-r2v2-vqc6/GHSA-g8wr-r2v2-vqc6.json"