CVE-2025-46655: CodiMD through 2.5.4 has a CSP-based protection mechanism against XSS through uploaded SVG documents containing JavaScript, but it can be bypassed...
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.
Classification
CVE ID: CVE-2025-46655
CVSS Base Severity: MEDIUM
CVSS Base Score: 4.9
CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
Problem Types
CWE-424 Improper Protection of Alternate PathAffected Products
Vendor: HackMD
Product: CodiMD
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.03% (probability of being exploited)
EPSS Percentile: 7.1% (scored less or equal to compared to others)
EPSS Date: 2025-05-25 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-46655https://github.com/hackmdio/codimd/issues/1910
https://github.com/zast-ai/vulnerability-reports/blob/main/formidable/file_upload/report.md