CVE-2020-9311
Silverstripe CMS XSS Vulnerability
In SilverStripe through 4.5, malicious users with a valid Silverstripe CMS login (usually CMS access) can craft profile information which can lead to XSS for other users through specially crafted login form URLs.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In SilverStripe through 4.5, malicious users with a valid Silverstripe CMS login (usually CMS access) can craft profile information which can lead to XSS for other users through specially crafted login form URLs.
- Record
CVE-2020-9311- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 3.5 Low
AV:N/AC:M/Au:S/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
In SilverStripe through 4.5, malicious users with a valid Silverstripe CMS login (usually CMS access) can craft profile information which can lead to XSS for other users through specially crafted login form URLs.
- Record
CVE-2020-9311- Updated
- 2026-11-02
EUVDEUVD-2022-2030 No score
In SilverStripe through 4.5, malicious users with a valid Silverstripe CMS login (usually CMS access) can craft profile information which can lead to XSS for other users through specially crafted login form URLs.
- Record
EUVD-2022-2030- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-2pw2-qpcp-m47x
Silverstripe CMS XSS Vulnerability
In SilverStripe through 4.5, malicious users with a valid Silverstripe CMS login (usually CMS access) can craft profile information which can lead to XSS for other users through specially crafted login form URLs.
- Record
GHSA-2pw2-qpcp-m47x- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
In SilverStripe through 4.5, malicious users with a valid Silverstripe CMS login (usually CMS access) can craft profile information which can lead to XSS for other users through specially crafted login form URLs.
- Record
CVE-2020-9311- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-2pw2-qpcp-m47x
Silverstripe CMS XSS Vulnerability
In SilverStripe through 4.5, malicious users with a valid Silverstripe CMS login (usually CMS access) can craft profile information which can lead to XSS for other users through specially crafted login form URLs.
- Record
GHSA-2pw2-qpcp-m47x- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVBIT-silverstripe-2020-9311 No score
In SilverStripe through 4.5, malicious users with a valid Silverstripe CMS login (usually CMS access) can craft profile information which can lead to XSS for other users through specially crafted login form URLs.
- Record
BIT-silverstripe-2020-9311- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
silverstripe/cmsPackagist |
through 4.5.0 | None known |
silverstripe/frameworkPackagist |
3.0.0 up to 3.7.5 | 3.7.5 |
silverstripeBitnami |
3.0.0 up to 3.7.5 | 3.7.5 |
silverstripe/cmsPackagist |
through 4.5.0, plus listed versions 2.4.102.4.112.4.122.4.132.4.9 Show 45 moreShow less2.5.03.0.103.0.10-rc13.0.113.0.11-rc13.0.123.0.133.0.143.0.2.13.0.33.0.3-rc13.0.3-rc23.0.43.0.53.0.63.0.6-rc13.0.6-rc23.0.73.0.7-rc13.0.83.0.93.0.9-rc13.1.03.1.0-beta13.1.0-beta23.1.0-beta33.1.0-rc13.1.0-rc23.1.0-rc33.1.13.1.103.1.10-rc13.1.10-rc23.1.113.1.11-rc13.1.123.1.133.1.13-rc13.1.143.1.14-rc13.1.153.1.163.1.16-rc13.1.173.1.17-rc1 |
None known |
silverstripe/frameworkPackagist |
3.0.0 up to 3.7.5, plus listed versions 3.0.103.0.10-rc13.0.113.0.11-rc13.0.12 Show 45 moreShow less3.0.133.0.143.0.2.13.0.33.0.3-rc13.0.3-rc23.0.43.0.53.0.63.0.6-rc13.0.6-rc23.0.73.0.7-rc13.0.83.0.93.0.9-rc13.1.03.1.0-beta13.1.0-beta23.1.0-beta33.1.0-rc13.1.0-rc23.1.0-rc33.1.13.1.103.1.10-rc13.1.10-rc23.1.113.1.11-rc13.1.123.1.133.1.13-rc13.1.143.1.14-rc13.1.153.1.163.1.16-rc13.1.173.1.17-rc13.1.17-rc23.1.183.1.18-rc13.1.18-rc23.1.193.1.19-rc1 |
3.7.5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-9311 is a medium vulnerability (CVSS 5.4) in Silverstripe, published July 15, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.56%, the 46th percentile. Fixed in silverstripe/framework 3.7.5.
References
silverstripe.org/download/security-releases/CVE-2020-9311
nvd.nist.gov/vuln/detail/CVE-2020-9311
github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2020-9311.yaml
Left out here: 290 versions. The JSON record has them.