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CVE-2026-54721

CVE-2026-54721 · Silverstripe UserForms: Remote code execution via userforms email subject

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Silverstripe UserForms provides a visual form builder for the Silverstripe CMS. From 6.0.0 until 6.4.9, 7.0.7, and 7.1.1, the userform email recipient subject field in the CMS accepts a specially crafted payload that can be interpreted as executable server-side code. An authenticated CMS user with permission to configure a UserForms email recipient can use the subject field to run arbitrary code on the server, compromising confidentiality, integrity, and availability. This issue is fixed in versions 6.4.9, 7.0.7, and 7.1.1.

CVSS 8.8 · High · EPSS 0.7% · Fix available

Published
Updated

Stack: php

Affected products and versions

  • silverstripe-userforms

    Versions
    • < 6.4.9: Affected
    • >= 7.0.0, < 7.0.7: Affected
    • >= 7.1.0, < 7.1.1: Affected

    No fix published

  • silverstripe/userforms Packagist

    Versions
    • 0.5.1
    • 1.0.1
    • 1.1.0-beta
    • 2.0.1
    • 2.0.1-rc1
    • 2.0.10
    • 2.0.2
    • 2.0.3
    • 2.0.4
    • 2.0.5
    • 2.0.6
    • 2.0.7
    • 2.0.8
    • 2.0.9
    • 3.0.0
    • 3.0.0-beta1
    • 3.0.1
    • 3.0.2
    • 3.1.0
    • 3.1.1
    • 3.1.2
    • 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
    • 5.0.0
    • 5.0.0-beta1
    • 5.0.0-beta2
    • 5.0.1
    • 5.0.2
    • 5.1.0
    • 5.1.1
    • 5.10.0
    • 5.10.0-alpha1
    • 5.10.0-beta1
    • 5.10.0-rc1
    • 5.11.0
    • 5.11.1
    • 5.12.0
    • 5.12.1
    • 5.12.2
    • 5.13.0
    • 5.13.0-beta1
    • 5.13.0-rc1
    • 5.13.1
    • 5.13.2
    • 5.13.3
    • 5.13.4
    • 5.14.0
    • 5.14.0-beta1
    • 5.14.0-rc1
    • 5.14.1
    • 5.14.2
    • 5.14.3
    • 5.15.0
    • 5.15.0-beta1
    • 5.15.0-rc1
    • 5.15.1
    • 5.15.10
    • 5.15.11
    • 5.15.2
    • 5.15.3
    • 5.15.4
    • 5.15.5
    • 5.15.6
    • 5.15.7
    • 5.15.8
    • 5.15.9
    • 5.2.0
    • 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
    • 5.6.0-rc1
    • 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
    • 5.9.0-beta1
    • 5.9.0-rc1
    • 5.9.1
    • 6.0.0
    • 6.0.0-beta1
    • 6.0.0-rc1
    • 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
    • 6.1.0-beta1
    • 6.1.0-rc1
    • 6.1.1
    • 6.1.2
    • 6.2.0
    • 6.2.0-beta1
    • 6.2.0-rc1
    • 6.2.1
    • 6.2.10
    • 6.2.2
    • 6.2.3
    • 6.2.4
    • 6.2.5
    • 6.2.6
    • 6.2.7
    • 6.2.8
    • 6.2.9
    • 6.3.0
    • 6.3.0-beta1
    • 6.3.0-rc1
    • 6.3.1
    • 6.3.2
    • 6.4.0
    • 6.4.0-beta1
    • 6.4.0-rc1
    • 6.4.1
    • 6.4.2
    • 6.4.3
    • 6.4.4
    • 6.4.5
    • 6.4.6
    • 6.4.7
    • 6.4.8
    • v5.9.2
    Affected ranges
    • ECOSYSTEM: < 6.4.9

    Update to 6.4.9

  • silverstripe/userforms Packagist

    Versions
    • 7.0.0
    • 7.0.1
    • 7.0.2
    • 7.0.3
    • 7.0.4
    • 7.0.5
    • 7.0.6
    Affected ranges
    • ECOSYSTEM: ≥ 7.0.0, < 7.0.7

    Update to 7.0.7

  • silverstripe/userforms Packagist

    Versions
    • 7.1.0
    Affected ranges
    • ECOSYSTEM: ≥ 7.1.0, < 7.1.1

    Update to 7.1.1

Original sources

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