CVE-2021-23424

CVE-2021-23424 is a high-severity vulnerability in Ansi-html Project Ansi-html with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

This affects all versions of package ansi-html. If an attacker provides a malicious string, it will get stuck processing the input for an extremely long time.

Frequently asked questions

What is CVE-2021-23424?
This affects all versions of package ansi-html. If an attacker provides a malicious string, it will get stuck processing the input for an extremely long time.
How severe is CVE-2021-23424?
CVE-2021-23424 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-23424 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23424?
CVE-2021-23424 affects Ansi-html Project Ansi-html. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23424?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-23424 published?
CVE-2021-23424 was published on 2021-08-18 and last updated on 2026-06-17.

References

Affected products (1)