CVE-2021-22863
5.5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:P/A:N
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
8 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
54.1%
An improper access control vulnerability was identified in the GitHub Enterprise Server GraphQL API that allowed authenticated users of the instance to modify the maintainer collaboration permission of a pull request without proper authorization. By exploiting this vulnerability, an attacker would be able to gain access to head branches of pull requests opened on repositories of which they are a maintainer. Forking is disabled by default for organization owned private repositories and would prevent this vulnerability. Additionally, branch protections such as required pull request reviews or status checks would prevent unauthorized commits from being merged without further review or validation. This vulnerability affected all versions of GitHub Enterprise Server since 2.12.22 and was fixed in versions 2.20.24, 2.21.15, 2.22.7 and 3.0.1. This vulnerability was reported via the GitHub Bug Bounty program.
Affected configurations
| Vendor | Product | Version | CPE |
|---|---|---|---|
| github | enterprise_server | * | cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* |
| github | enterprise_server | * | cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* |
| github | enterprise_server | * | cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* |
| github | enterprise_server | * | cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* |
CNA Affected
[
{
"product": "GitHub Enterprise Server",
"vendor": "GitHub",
"versions": [
{
"lessThan": "2.20.24",
"status": "affected",
"version": "2.20",
"versionType": "custom"
},
{
"lessThan": "2.21.15",
"status": "affected",
"version": "2.21",
"versionType": "custom"
},
{
"lessThan": "2.22.7",
"status": "affected",
"version": "2.22",
"versionType": "custom"
},
{
"lessThan": "3.0.1",
"status": "affected",
"version": "3.0",
"versionType": "custom"
}
]
}
]References
Social References
More
5.5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:P/A:N
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
8 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
54.1%