CVE-2020-9311
No exploitation reported by the sources we read.
- Published2020-07-15
- Fixed in3.7.5
- WeaknessCWE-79
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
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.
Timeline
dates in UTC- 2020-07-1521:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-9311?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-9311?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 3.x | ≥ 3.0.0, < 3.7.5 | 3.7.5 | NVD · OSV |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.5 | ≤ 4.5.0 | no fix published | OSV |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Silverstripe to 3.7.5
Advisories and patches
- www.silverstripe.orgVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.15.4read 2026-10-23
- NVDCVSS 2.03.5read 2026-10-23
- NVDweakness (CWE)CWE-79read 2026-10-23
- FIRST EPSSEPSS score0.6 %2026-10-23
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- Published
- 2020-07-15
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-9311?
Is CVE-2020-9311 actively exploited?
What is the CVSS score for CVE-2020-9311?
Running silverstripe? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.