Arbitrary Code Injection Affecting silverstripe/userforms package, versions <6.4.9>=7.0.0, <7.0.7>=7.1.0, <7.1.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-SILVERSTRIPEUSERFORMS-20186880
- published28 Sept 2026
- disclosed27 Aug 2026
- creditUnknown
Introduced: 27 Aug 2026
CVE-2026-54721 (opens in a new tab)How to fix?
Upgrade silverstripe/userforms to version 6.4.9, 7.0.7, 7.1.1 or higher.
Overview
silverstripe/userforms is a module that provides a visual form builder for the SilverStripe CMS.
Affected versions of this package are vulnerable to Arbitrary Code Injection via the userforms email subject process. An attacker can execute arbitrary code on the server by submitting a specially crafted payload.