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CVE-2026-55779— Silverstripe Versioned: XSS in archive admin restore

Quick assessment

Affected
silverstripe silverstripe-versioned
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Silverstripe Versioned 为 Silverstripe 模型提供版本控制功能。在 3.2.1 版本之前， 中的 方法在生成归档管理员恢复通知时，直接将 、 、 和 以 形式渲染并插入到通知中，但未对其应用 进行转义。 当管理员恢复一个标题或 URL 段经过恶意构造的归档页面时，生成的恢复提示信息会在管理员的浏览器中执行存储型 JavaScript 代码，从而破坏 CMS 会话的机密性和完整性。该问题已在 3.2.1 版本中修复。

CVSS 5.4 · Medium

Possible ATT&CK Techniques 2 AI

T1024 T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-55779

Vulnerability Information
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Vulnerability Title
Silverstripe Versioned: XSS in archive admin restore
Source: CVE Program / CVE List V5
Vulnerability Description
Silverstripe 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
silverstripe silverstripe-versioned < 3.2.1 -

II. Public POCs for CVE-2026-55779

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III. Intelligence Information for CVE-2026-55779

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Patches & Fixes for CVE-2026-55779 (2)

Vendor Advisories for CVE-2026-55779 (2)

Vendor Pages for CVE-2026-55779 (1)

IV. Related Vulnerabilities

Same vendor: silverstripe
Same weakness: CWE-79

V. Comments for CVE-2026-55779

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