Hackmd: Security Vulnerabilities
CodiMD through 2.2.0 has a CSP-based protection mechanism against XSS through uploaded JavaScript content, but it can be bypassed by uploading a .html file that references an uploaded .js file.
CVSS Score
4.9
EPSS Score
0.0
Published
2025-04-26
CodiMD allows realtime collaborative markdown notes on all platforms. The notebook feature of Hackmd.io permits the rendering of iframe `HTML` tags with an improperly sanitized `name` attribute. This vulnerability enables attackers to perform cross-site scripting (XSS) attacks via DOM clobbering. This vulnerability is fixed in 2.5.4.
CVSS Score
8.1
EPSS Score
0.003
Published
2024-07-10
HackMD CodiMD <2.5.2 is vulnerable to Denial of Service.
CVSS Score
7.5
EPSS Score
0.005
Published
2024-02-21
CodiMD 1.3.1, when Safari is used, allows XSS via an IFRAME element with allow-top-navigation in the sandbox attribute, in conjunction with a data: URL.
CVSS Score
6.1
EPSS Score
0.002
Published
2019-08-23