CVE-2025-25197: Silverstripe Elemental enables XSS attacks in elemental "Content blocks in use" reports

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-04-10 · updated 2026-06-17
Weakness: CWE-79

Description

Silverstripe Elemental extends a page type to swap the content area for a list of manageable elements to compose a page out of rather than a single text field. An elemental block can include an XSS payload, which can be executed when viewing the "Content blocks in use" report. The vulnerability is specific to that report and is a result of failure to cast input prior to including it in the grid field. This vulnerability is fixed in 5.3.12.

Affected products

silverstripe-elemental: from 2.1.2, < 5.3.12

References

https://github.com/silverstripe/silverstripe-elemental/commit/34ff4ed498ccab94cc5f55ef9a56c37f491eda1d
https://github.com/silverstripe/silverstripe-elemental/security/advisories/GHSA-x8xm-c7p8-2pj2
https://www.silverstripe.org/download/security-releases/CVE-2025-25197

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