erusev/parsedown · Security
Parsedown Class-Name Injection
- GHSA ID
- GHSA-62m3-fc7f-jpp8
- CVE ID
- CVE-2019-10905
- Severity
- high
- Published
- Updated
- CVSS
- 8.1 · CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS v3
- 8.1 · CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
Parsedown before 1.7.2, when safe mode is used and HTML markup is disabled, might allow attackers to execute arbitrary JavaScript code if a script (already running on the affected page) executes the contents of any element with a specific class. This occurs because spaces are permitted in code block infostrings, which interferes with the intended behavior of a single class name beginning with the language- substring.
CWEs
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- https://github.com/erusev/parsedown/issues/699 ↗
- https://github.com/FriendsOfPHP/security-advisories/blob/master/erusev/parsedown/CVE-2019-10905.yaml ↗
- https://nvd.nist.gov/vuln/detail/CVE-2019-10905 ↗
- https://github.com/erusev/parsedown/releases/tag/1.7.2 ↗
- https://github.com/advisories/GHSA-62m3-fc7f-jpp8 ↗