CVE-2022-21650

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    CVE-2022-21650

    Published: 4 Jan 2022Last Modified: 12 Aug 2026

    Summary: Stored XSS via html file upload in convos

    Details: Convos is an open source multi-user chat that runs in a web browser. You can't use SVG extension in Convos' chat window, but you can upload a file with an .html extension. By uploading an SVG file with an html extension the upload filter can be bypassed. This causes Stored XSS. Also, after uploading a file the XSS attack is triggered upon a user viewing the file. Through this vulnerability, an attacker is capable to execute malicious scripts. Users are advised to update as soon as possible.

    References: https://www.huntr.dev/bounties/ae424798-de01-4972-b73b-2db674f82368/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21650.json, https://github.com/convos-chat/convos/security/advisories/GHSA-mm2v-4v7g-m695, https://nvd.nist.gov/vuln/detail/CVE-2022-21650, https://github.com/convos-chat/convos/commit/5c0a1ec9a2c147bc3b63fd5a48da5f32e18fe5df, https://blog.pocas.kr/2021/12/30/2021-12-30-s-xss-convos-chat/#First-vulnerability

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- ac6561598373139c127d32bd7399a524ef17a76f
    Fixed -794ab7d2273327829230bfa96b5b3126b0547bb1

    Affected versions

    v6.51

    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-2022-21650 | CVE-DB