BIT-oauth2-proxy-2020-11053

    Dashboard / Vulnerabilities / BIT-oauth2-proxy-2020-11053

    BIT-oauth2-proxy-2020-11053

    Published: 6 Mar 2024Last Modified: 10 Sept 2026

    Summary: Open Redirect in OAuth2 Proxy

    Details: In OAuth2 Proxy before 5.1.1, there is an open redirect vulnerability. Users can provide a redirect address for the proxy to send the authenticated user to at the end of the authentication flow. This is expected to be the original URL that the user was trying to access. This redirect URL is checked within the proxy and validated before redirecting the user to prevent malicious actors providing redirects to potentially harmful sites. However, by crafting a redirect URL with HTML encoded whitespace characters the validation could be bypassed and allow a redirect to any URL provided. This has been patched in 5.1.1.

    References: https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-j7px-6hwj-hpjg, https://nvd.nist.gov/vuln/detail/CVE-2020-11053

    Affected packages

    Package

    Name: oauth2-proxy

    Purl: pkg:bitnami/oauth2-proxy

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -5.1.1

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    BIT-oauth2-proxy-2020-11053 | CVE-DB