Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-414d-7bfm-kud7
Vulnerability ID VCID-414d-7bfm-kud7
Aliases CVE-2021-28661
GHSA-r7rh-g777-g5gx
Summary Incorrect Authorization Default SilverStripe GraphQL Server (aka silverstripe/graphql) permission checker is not inherited by query subclass.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-863 Incorrect Authorization
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2021-28661
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-r7rh-g777-g5gx
cvssv3.1 4.3 https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/graphql/CVE-2021-28661.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/graphql/CVE-2021-28661.yaml
cvssv3.1 4.3 https://github.com/silverstripe/silverstripe-graphql
generic_textual MODERATE https://github.com/silverstripe/silverstripe-graphql
cvssv3.1 4.3 https://github.com/silverstripe/silverstripe-graphql/pull/407/commits/16961459f681f7b32145296189dfdbcc7715e6ed
generic_textual MODERATE https://github.com/silverstripe/silverstripe-graphql/pull/407/commits/16961459f681f7b32145296189dfdbcc7715e6ed
cvssv3.1 4.3 https://github.com/silverstripe/silverstripe-graphql/releases
generic_textual MODERATE https://github.com/silverstripe/silverstripe-graphql/releases
cvssv3.1 4.3 https://github.com/silverstripe/silverstripe-graphql/releases/tag/3.5.2
generic_textual MODERATE https://github.com/silverstripe/silverstripe-graphql/releases/tag/3.5.2
cvssv3.1 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-28661
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-28661
cvssv3.1 4.3 https://www.silverstripe.org/download/security-releases/CVE-2021-28661
generic_textual MODERATE https://www.silverstripe.org/download/security-releases/CVE-2021-28661
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-28661
https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/graphql/CVE-2021-28661.yaml
https://github.com/silverstripe/silverstripe-graphql
https://github.com/silverstripe/silverstripe-graphql/pull/407/commits/16961459f681f7b32145296189dfdbcc7715e6ed
https://github.com/silverstripe/silverstripe-graphql/releases
https://github.com/silverstripe/silverstripe-graphql/releases/tag/3.5.2
CVE-2021-28661 https://nvd.nist.gov/vuln/detail/CVE-2021-28661
CVE-2021-28661 https://www.silverstripe.org/download/security-releases/CVE-2021-28661
GHSA-r7rh-g777-g5gx https://github.com/advisories/GHSA-r7rh-g777-g5gx
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/graphql/CVE-2021-28661.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:N/S:U/C:L/I:N/A:N Found at https://github.com/silverstripe/silverstripe-graphql
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:N/S:U/C:L/I:N/A:N Found at https://github.com/silverstripe/silverstripe-graphql/pull/407/commits/16961459f681f7b32145296189dfdbcc7715e6ed
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:N/S:U/C:L/I:N/A:N Found at https://github.com/silverstripe/silverstripe-graphql/releases
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:N/S:U/C:L/I:N/A:N Found at https://github.com/silverstripe/silverstripe-graphql/releases/tag/3.5.2
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:N/S:U/C:L/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-28661
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:N/S:U/C:L/I:N/A:N Found at https://www.silverstripe.org/download/security-releases/CVE-2021-28661
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 0.37972
EPSS Score 0.00169
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:48:54.461535+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/silverstripe/secureassets/CVE-2021-28661.yml 38.0.0