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Silverstripe Framework: Possible XSS attack through media embed · Bugflare

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Silverstripe Framework: Possible XSS attack through media embed

GitHub AdvisoriesAugust 27, 2026Sign in to save

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advisory github CVE-2026-54720 medium

Impact

The "Insert media from web" functionality in the CMS is vulnerable to XSS from a specially crafted embed.

Reported by

Jack Wallace from Bastion Security

References

GHSA-gvrw-qqp5-jgc5
https://nvd.nist.gov/vuln/detail/CVE-2026-54720
silverstripe/silverstripe-framework#11993
silverstripe/silverstripe-framework@1bcb02a
https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2026-54720.yaml
https://github.com/silverstripe/silverstripe-framework/releases/tag/6.2.2
https://www.silverstripe.org/download/security-releases/cve-2026-54720

Source

Originally published by GitHub Advisories (github.com).

Shown in Bugflare for convenience. Ownership and accuracy remain with the original publisher — always verify on the source when it matters.

Open original on github.com →https://github.com/advisories/GHSA-gvrw-qqp5-jgc5

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