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Vulnerability details: VCID-2f9j-ek3x-kbc5
Vulnerability ID VCID-2f9j-ek3x-kbc5
Aliases CVE-2020-9311
GHSA-2pw2-qpcp-m47x
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
epss 0.00343 https://api.first.org/data/v1/epss?cve=CVE-2020-9311
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-2pw2-qpcp-m47x
cvssv3.1 5.4 https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2020-9311.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2020-9311.yaml
cvssv3.1 5.4 https://github.com/silverstripe/silverstripe-cms
generic_textual MODERATE https://github.com/silverstripe/silverstripe-cms
cvssv3.1 5.4 https://nvd.nist.gov/vuln/detail/CVE-2020-9311
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2020-9311
cvssv3.1 5.4 https://www.silverstripe.org/download/security-releases/cve-2020-9311
generic_textual MODERATE https://www.silverstripe.org/download/security-releases/cve-2020-9311
cvssv3.1 5.4 https://www.silverstripe.org/download/security-releases/CVE-2020-9311
generic_textual MODERATE https://www.silverstripe.org/download/security-releases/CVE-2020-9311
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-9311
https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2020-9311.yaml
https://github.com/silverstripe/silverstripe-cms
https://nvd.nist.gov/vuln/detail/CVE-2020-9311
https://www.silverstripe.org/download/security-releases/cve-2020-9311
https://www.silverstripe.org/download/security-releases/CVE-2020-9311
CVE-2020-9311 https://www.silverstripe.org/download/security-releases/cve-2020-9311/
GHSA-2pw2-qpcp-m47x https://github.com/advisories/GHSA-2pw2-qpcp-m47x
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2020-9311.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/silverstripe/silverstripe-cms
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-9311
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://www.silverstripe.org/download/security-releases/cve-2020-9311
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://www.silverstripe.org/download/security-releases/CVE-2020-9311
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.56823
EPSS Score 0.00343
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:09:08.883988+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-2pw2-qpcp-m47x/GHSA-2pw2-qpcp-m47x.json 38.0.0