Silverstripe Framework: Possible XSS attack through media embed
Priority LOW 24CWE-79Published · Updated
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 Framework is a PHP framework which powers the Silverstripe CMS. In versions prior to 6.2.2, the "Insert media from web" functionality in the CMS is vulnerable to XSS from a specially crafted embed. This issue was fixed in version 6.2.2/
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00263 18th percentileScored 2026-11-07
Fix Fixed silverstripe-framework (silverstripe): 6.2.2silverstripe/framework (Packagist): 6.2.2
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-framework | before 6.2.2 | 6.2.2 | Patch available | CNA |
| — | silverstripe/framework (Packagist) | before 6.2.2 | 6.2.2 | Patch available | GHSA-gvrw-qqp5-jgc5 |
- silverstripe-framework Vendorsilverstripe Affected before 6.2.2 Fixed in 6.2.2 Patch available CNA
- silverstripe/framework (Packagist) Vendor— Affected before 6.2.2 Fixed in 6.2.2 Patch available GHSA-gvrw-qqp5-jgc5
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:silverstripe:framework:*:*:*:*:*:*:*:* | — | — | silverstripe |
- cpe:2.3:a:silverstripe:framework:*:*:*:*:*:*:*:* Versions — — ·silverstripe
Remediation
- Fix · CNA silverstripe-framework (silverstripe) Fixed in 6.2.2
- Fix · GHSA-gvrw-qqp5-jgc5 silverstripe/framework (Packagist) Fixed in 6.2.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-54720
- 2026-10-03 Alias added: GHSA-gvrw-qqp5-jgc5
References
Other 7
- https://github.com/silverstripe/silverstripe-framework/security/advisories/GHSA-gvrw-qqp5-jgc5
- https://www.silverstripe.org/download/security-releases/cve-2026-54720
- https://github.com/silverstripe/silverstripe-framework/pull/11993
- https://github.com/silverstripe/silverstripe-framework/commit/1bcb02adfc365c6436dc26ab2f6dd32d97f3979b
- https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2026-54720.yaml
- https://github.com/silverstripe/silverstripe-framework
- https://github.com/silverstripe/silverstripe-framework/releases/tag/6.2.2
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-2026-54720 · CVE Program
- CVE-2026-54720 · NVD
- FIRST EPSS
- GHSA-gvrw-qqp5-jgc5 · GitHub Advisory Database · CC BY 4.0
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