CVE-2021-28661
SilverStripe GraphQL Server permission checker not inherited by query subclass.
Default SilverStripe GraphQL Server (aka silverstripe/graphql) 3.x through 3.4.1 permission checker not inherited by query subclass.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Default SilverStripe GraphQL Server (aka silverstripe/graphql) 3.x through 3.4.1 permission checker not inherited by query subclass.
- Record
CVE-2021-28661- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:P/I:N/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
CVE List No score
Default SilverStripe GraphQL Server (aka silverstripe/graphql) 3.x through 3.4.1 permission checker not inherited by query subclass.
- Record
CVE-2021-28661- Updated
- 2026-11-02
EUVDEUVD-2021-2253 No score
Default SilverStripe GraphQL Server (aka silverstripe/graphql) 3.x through 3.4.1 permission checker not inherited by query subclass.
- Record
EUVD-2021-2253- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-r7rh-g777-g5gx
SilverStripe GraphQL Server permission checker not inherited by query subclass.
Default SilverStripe GraphQL Server (aka silverstripe/graphql) 3.x through 3.4.1 permission checker not inherited by query subclass.
- Record
GHSA-r7rh-g777-g5gx- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
OSV
Default SilverStripe GraphQL Server (aka silverstripe/graphql) 3.x through 3.4.1 permission checker not inherited by query subclass.
- Record
CVE-2021-28661- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVGHSA-r7rh-g777-g5gx
SilverStripe GraphQL Server permission checker not inherited by query subclass.
Default SilverStripe GraphQL Server (aka silverstripe/graphql) 3.x through 3.4.1 permission checker not inherited by query subclass.
- Record
GHSA-r7rh-g777-g5gx- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
OSVBIT-silverstripe-2021-28661 No score
Default SilverStripe GraphQL Server (aka silverstripe/graphql) 3.x through 3.4.1 permission checker not inherited by query subclass.
- Record
BIT-silverstripe-2021-28661- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
silverstripe/graphqlPackagist |
3.0.0 up to 3.5.2 | 3.5.2 |
silverstripeBitnami |
3.0.0 up to 3.4.1 | 3.4.1 |
silverstripe/graphqlPackagist |
3.0.0 up to 3.5.2, plus listed versions 3.0.13.0.23.0.33.0.43.1.0 Show 25 moreShow less3.1.0-rc13.1.13.1.23.1.33.1.43.1.53.2.03.2.0-alpha13.2.0-rc13.2.0-rc23.2.13.2.23.2.33.2.43.3.03.3.0-beta13.3.0-rc13.4.03.4.0-beta13.4.0-rc13.4.13.5.03.5.0-beta13.5.0-rc13.5.1 |
3.5.2 |
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-2021-28661 is a medium vulnerability (CVSS 4.3) in Silverstripe, published October 7, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.81%, the 57th percentile. Fixed in silverstripe/graphql 3.5.2.
References
github.com/silverstripe/silverstripe-graphql/releases
silverstripe.org/download/security-releases/CVE-2021-28661
nvd.nist.gov/vuln/detail/CVE-2021-28661