CVE-2022-36048

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    CVE-2022-36048

    Published: 31 Aug 2022Last Modified: 12 Aug 2026

    Summary: IP address leak via image proxy bypass in Zulip Server

    Details: Zulip is an open-source team collaboration tool with topic-based threading that combines email and chat. When displaying messages with embedded remote images, Zulip normally loads the image preview via a go-camo proxy server. However, an attacker who can send messages could include a crafted URL that tricks the server into embedding a remote image reference directly. This could allow the attacker to infer the viewer’s IP address and browser fingerprinting information. This vulnerability is fixed in Zulip Server 5.6. Zulip organizations with image and link previews [disabled](https://zulip.com/help/allow-image-link-previews) are not affected.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/36xxx/CVE-2022-36048.json, https://github.com/zulip/zulip/security/advisories/GHSA-vg5m-mf9x-j452, https://nvd.nist.gov/vuln/detail/CVE-2022-36048

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -d6533973b6b86b396305e225196c4739fec4574b

    Affected versions

    5.5

    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
    CVE-2022-36048 | CVE-DB