CVE-2021-28661 json
SilverStripe GraphQL Server permission checker not inherited by query subclass.
published 2021-10-07 5 y ago modified 2026-06-17 4 mo ago also BIT-silverstripe-2021-28661 , EUVD-2021-2253 , GHSA-r7rh-g777-g5gx
- cvss
- 4.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
Default SilverStripe GraphQL Server (aka silverstripe/graphql) 3.x through 3.4.1 permission checker not inherited by query subclass.
Patch / fix
- packagist silverstripe/graphql 3.5.2
- bitnami silverstripe 3.4.1
Exploit prediction
0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- silverstripe.org https://www.silverstripe.org/download/security-releases/CVE-2021-28661 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:P/I:N/A:N |
| OSV | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | silverstripe/graphql | >=3.0.0, <3.5.2 |
3.5.2 |
| bitnami | silverstripe | >=3.0.0, <3.4.1 |
3.4.1 |
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/silverstripe/silverstripe-graphql/pull/407/commits/16961459f681f7b32145296189dfdbcc7715e6ed
web
-
silverstripe.org
/download/security-releases/CVE-2021-28661
web, exploit, vendor-advisory
-
github.com
/silverstripe/silverstripe-graphql/releases
web, release-notes, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-28661
advisory
-
github.com
/FriendsOfPHP/security-advisories/blob/master/silverstripe/graphql/CVE-2021-28661.yaml
web
-
github.com
/silverstripe/silverstripe-graphql
package
-
github.com
/silverstripe/silverstripe-graphql/releases/tag/3.5.2
web
Sources
- CVE List CVE-2021-28661
- GitHub Advisory GHSA-r7rh-g777-g5gx
- NVD CVE-2021-28661
- OSV BIT-silverstripe-2021-28661
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