PatchTheCVECVE-2024-21535: Versions of the package markdown-to-jsx before 7.4.0 are vulnerable to Cross-site Scripting (XSS) via the src
CVE-2024-21535 is a medium-severity flaw (CVSS 6.1) affecting markdown-to-jsx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Versions of the package markdown-to-jsx before 7.4.0 are vulnerable to Cross-site Scripting (XSS) via the src property due to improper input sanitization. An attacker can execute arbitrary code by injecting a malicious iframe element in the markdown.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.1 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.5% (top 56%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2024-10-15 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2024-21535?
markdown-to-jsx: upgrade to 7.4.0. Exact commands for each OS are on this page.
Is CVE-2024-21535 being exploited?
CVE-2024-21535 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2024-21535 affect?
CVE-2024-21535 affects markdown-to-jsx. Severity is medium (CVSS 6.1). Versions of the package markdown-to-jsx before 7.4.0 are vulnerable to Cross-site Scripting (XSS) via the src property due to improper input sanitization. An attacker can execute arbitrary code by injecting a malicious iframe element in the
How urgent is CVE-2024-21535?
Priority 32/100. No elevated risk signals yet.