Vulnerability Description
Python-Markdown 3.0 through 3.11.2 contains an algorithmic complexity vulnerability in inline link parsing that allows remote attackers to exhaust CPU through unmatched brackets. Attackers can submit short Markdown containing repeated [ or ![ characters, forcing LinkInlineProcessor.getText() and getLink() into quadratic scans that keep workers busy for minutes.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/Python-Markdown/markdown
- https://github.com/Python-Markdown/markdown/blob/b41e0aaf1181f1a8cb200cf5a815aad
- https://github.com/Python-Markdown/markdown/issues/1654
- https://github.com/Python-Markdown/markdown/issues/798
- https://www.vulncheck.com/advisories/python-markdown-3.0-through-3.11.2-denial-o
FAQ
What is CVE-2019-25781?
CVE-2019-25781 is a vulnerability with a CVSS score of 7.5 (HIGH). Python-Markdown 3.0 through 3.11.2 contains an algorithmic complexity vulnerability in inline link parsing that allows remote attackers to exhaust CPU through unmatched brackets. Attackers can submit ...
How severe is CVE-2019-25781?
CVE-2019-25781 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-25781?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.