PT-2025-17964 · Codimd+1 · Codimd+1

Ninjagptop · Published 2025-04-26 · Updated 2025-10-28 · CVE-2025-46655

Positive Technologies (AI Summary)

CVSS v3.1

4.9

Medium

Base vector

AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions CodiMD versions 2.5.4 and earlier

Description The issue concerns a bypass of the Content Security Policy (CSP) protection mechanism against Cross-Site Scripting (XSS) attacks through uploaded SVG documents containing JavaScript. This bypass can occur in certain cases of different-origin file storage, such as AWS S3, where the selected architecture does not have components that can insert Content-Security-Policy headers. It's noted that using AWS for hosting untrusted JavaScript content can be considered a user error.

Recommendations For CodiMD versions 2.5.4 and earlier, consider implementing an alternative security mechanism to protect against XSS attacks, such as validating and sanitizing user-uploaded content, especially SVG documents. As a temporary workaround, restrict the upload of SVG documents or ensure that all file storage solutions, including AWS S3, are configured to insert appropriate Content-Security-Policy headers. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Weakness Enumeration

CWE-424

Related Identifiers

CVE-2025-46655

Affected Products

Aws S3

Codimd

References · 9

• 🔥 https://github.com/hackmdio/codimd/issues/1910 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-46655 · Security Note
• https://osv.dev/vulnerability/CVE-2025-46655 · Vendor Advisory
• https://github.com/zast-ai/vulnerability-reports/blob/main/formidable/file_upload/report.md · Note
• https://t.me/cvedetector/23808 · Telegram Post
• https://twitter.com/zast_ai/status/1983192145982042283 · Twitter Post
• https://t.me/cvenotify/119921 · Telegram Post
• https://twitter.com/CVEnew/status/1916233429277892894 · Twitter Post
• https://t.me/cvetracker/22425 · Telegram Post