Markdown to HTML XSS
Nobody has claimed this yet.
- Dominant language
- JavaScript
- Stars
- 325
- Forks
- 139
- PR merge metrics
- No merged PRs in 30d
Description
If I do [some text](javascript:alert('xss')) in the editor, this will get rendered when i click on the link.
The format above is in markdown
Therefore, this is quite vulnerable to attacks: https://github.com/showdownjs/showdown/wiki/Markdown%27s-XSS-Vulnerability-(and-how-to-mitigate-it)
Is there any way we can solve this?
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the reported [some text](javascript:alert('xss')) link in the editor and inspect the Markdown-to-HTML rendering path. Use the linked XSS reference as background; done means the payload no longer executes when rendered or clicked while normal links and images continue to work.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript, markdown
- Domain
- security
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100