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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 CMS SilverStripe是Silverstripe CMS组织开源的一套开源的编程框架和内容管理系统 (CMS)。 Silverstripe CMS SilverStripe 3.2.1之前版本存在跨站脚本漏洞，该漏洞源于src/RestoreAction.php中的RestoreAction::getRestoreMessage()函数在构建ArchiveAdmin恢复通知时未对插入的标题、URL段等内容应用Convert::raw2xml()转义，可能导致管理员恢复包

CVSS 5.4 · Medium EPSS 0.34% · P25

Possible ATT&CK Techniques 2 AI

T1024 T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
silverstripe silverstripe-versioned < 3.2.1 affected
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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
Vulnerability Title
Silverstripe CMS SilverStripe 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Silverstripe CMS SilverStripe是Silverstripe CMS组织开源的一套开源的编程框架和内容管理系统 (CMS)。 Silverstripe CMS SilverStripe 3.2.1之前版本存在跨站脚本漏洞，该漏洞源于src/RestoreAction.php中的RestoreAction::getRestoreMessage()函数在构建ArchiveAdmin恢复通知时未对插入的标题、URL段等内容应用Convert::raw2xml()转义，可能导致管理员恢复包
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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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