Silverstripe Versioned: XSS in archive admin restore

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55779
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 23:17:07 UTC
Updated2026-08-28 23:17:07 UTC
DescriptionSilverstripe Versioned provides versioning for Silverstripe models. Prior to 3.2.1, RestoreAction::getRestoreMessage() in src/RestoreAction.php builds ArchiveAdmin restore notifications rendered as CAST_HTML and inserts $restoredItem->Title, $restoredItem->URLSegment, $restoredItem->CMSEditLink(), and $changedProperty['value'] without applying Convert::raw2xml(). When an administrator restores an archived page containing a crafted title or URL segment, the generated restoration message can execute stored JavaScript in the administrator's browser, compromising the confidentiality and integrity of the CMS session. This issue is fixed in version 3.2.1.

Risk And Classification

Primary CVSS: v3.1 5.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
3.1CNADECLARED5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Silverstripe Silverstripe-versioned affected < 3.2.1 Not specified

References

ReferenceSourceLinkTags
github.com/silverstripe/silverstripe-versioned/security/advisories/GHSA-... [email protected] github.com
github.com/silverstripe/silverstripe-versioned/commit/6e30a2cf8d4b923369... [email protected] github.com
www.silverstripe.org/download/security-releases/cve-2026-55779 [email protected] www.silverstripe.org
github.com/silverstripe/silverstripe-versioned/pull/541 [email protected] github.com
github.com/silverstripe/silverstripe-versioned/releases/tag/3.2.1 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
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