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CVE-2026-54721

Silverstripe UserForms: Remote code execution via userforms email subject PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
silverstripe / silverstripe-userformsaffected < 6.4.9; affected >= 7.0.0, < 7.0.7; affected >= 7.1.0, < 7.1.1

CWE

CWE-94

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.