What’s Vulnerable › Vulnerabilities

CVE-2019-12300

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-05-23 · updated 2026-06-17
• Weakness: CWE-287

Description

Buildbot before 1.8.2 and 2.x before 2.3.1 accepts a user-submitted authorization token from OAuth and uses it to authenticate a user. If an attacker has a token allowing them to read the user details of a victim, they can login as the victim.

Affected products

• Buildbot: before 1.8.2; from 2.0.0 before 2.3.1 — fixed in 1.8.2, 2.3.1

How to fix

Upgrade to a fixed version: Buildbot 1.8.2, 2.3.1. Check the vendor advisory for mitigations.

References

• https://github.com/buildbot/buildbot/wiki/OAuth-vulnerability-in-using-submitted-authorization-token-for-authentication
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4XLOM2K4M4723BCLHZJEX52KJXZSEVRL/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7GXKO7OYLKBTXXXKF4VPHWT7GVYWFVYA/
• https://github.com/buildbot/buildbot/wiki/OAuth-vulnerability-in-using-submitted-authorization-token-for-authentication
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4XLOM2K4M4723BCLHZJEX52KJXZSEVRL/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7GXKO7OYLKBTXXXKF4VPHWT7GVYWFVYA/

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