CVE-2025-46655 – CodiMD AWS S3 SVG XSS Bypass

The following table lists the changes that have been made to the
CVE-2025-46655 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Apr. 26, 2025

    Action Type Old Value New Value
    Added Tag disputed
    Added Description CodiMD through 2.5.4 has a CSP-based protection mechanism against XSS through uploaded SVG documents containing JavaScript, but it can be bypassed in certain cases of different-origin file storage, such as AWS S3. NOTE: it can be considered a user error if AWS is employed for hosting untrusted JavaScript content, but the selected architecture within AWS does not have components that are able to insert Content-Security-Policy headers.
    Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
    Added CWE CWE-424
    Added Reference https://github.com/hackmdio/codimd/issues/1910
    Added Reference https://github.com/zast-ai/vulnerability-reports/blob/main/formidable/file_upload/report.md
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