Silverstripe Versioned: XSS in archive admin restore
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| silverstripe | silverstripe-versioned | before 3.2.1 | 3.2.1 | Patch available | CNA |
| — | silverstripe/versioned (Packagist) | before 3.2.1 | 3.2.1 | Patch available | GHSA-m4g4-86qc-v8w7 |
- silverstripe-versioned Vendorsilverstripe Affected before 3.2.1 Fixed in 3.2.1 Patch available CNA
- silverstripe/versioned (Packagist) Vendor— Affected before 3.2.1 Fixed in 3.2.1 Patch available GHSA-m4g4-86qc-v8w7
Remediation
- Fix · CNA silverstripe-versioned (silverstripe) Fixed in 3.2.1
- Fix · GHSA-m4g4-86qc-v8w7 silverstripe/versioned (Packagist) Fixed in 3.2.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-55779
- 2026-10-03 Alias added: GHSA-m4g4-86qc-v8w7
References
Other 7
- https://github.com/silverstripe/silverstripe-versioned/security/advisories/GHSA-m4g4-86qc-v8w7
- https://github.com/silverstripe/silverstripe-versioned/pull/541
- https://github.com/silverstripe/silverstripe-versioned/commit/6e30a2cf8d4b9233690464da61bd0fc4d3e92952
- https://github.com/silverstripe/silverstripe-versioned/releases/tag/3.2.1
- https://www.silverstripe.org/download/security-releases/cve-2026-55779
- https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/versioned/CVE-2026-55779.yaml
- https://github.com/silverstripe/silverstripe-versioned
More silverstripe vulnerabilities
- TI-2007-02239 Unspecified vulnerability in the search functionality in SilverStripe 2.0.0 has unknown impact and attack vectors. CVSS 2.0HIGH 10.0
- TI-2019-09110 In SilverStripe through 4.3.3, a missing warning about leaving install.php in a public… CVSS 3.1CRITICAL 9.8
- TI-2019-09070 SQL injection vulnerability in silverstripe/restfulserver module 1.0.x before 1.0.9… CVSS 3.0CRITICAL 9.8
- TI-2019-04049 All versions of SilverStripe 3 prior to 3.6.7 and 3.7.3, and all versions of SilverStripe… CVSS 3.0CRITICAL 9.8
- TI-2022-17852 Silverstripe silverstripe/framework through 4.11 allows SQL Injection. CVSS 3.1HIGH 8.8
- TI-2020-07444 Silverstripe CMS through 4.5 can be susceptible to script execution from malicious upload… CVSS 3.1HIGH 8.8
Sources
- CVE-2026-55779 · CVE Program
- CVE-2026-55779 · NVD
- FIRST EPSS
- GHSA-m4g4-86qc-v8w7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences