CVE-2021-4245

Name: CVE-2021-4245
Creator: NVD / NIST
Published: 2022-12-15T20:15:09.783+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.27%

Last modified Jun 17, 2026

CVE-2021-4245 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability classified as problematic has been found in chbrown rfc6902. This affects an unknown part of the file pointer.ts. EPSS estimates a 1.27% chance of exploitation in the next 30 days.

Description

A vulnerability classified as problematic has been found in chbrown rfc6902. This affects an unknown part of the file pointer.ts. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). The exploit has been disclosed to the public and may be used. The name of the patch is c006ce9faa43d31edb34924f1df7b79c137096cf. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-215883.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.27%

66.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rfc6902 Project	Rfc6902	< 5.0.0

References

https://github.com/chbrown/rfc6902/commit/c006ce9faa43d31edb34924f1df7b79c137096cfPatch, Third Party Advisory
https://github.com/chbrown/rfc6902/pull/76Exploit, Patch, Third Party Advisory
https://vuldb.com/?id.215883Permissions Required, Third Party Advisory
https://github.com/chbrown/rfc6902/commit/c006ce9faa43d31edb34924f1df7b79c137096cfPatch, Third Party Advisory
https://github.com/chbrown/rfc6902/pull/76Exploit, Patch, Third Party Advisory
https://vuldb.com/?id.215883Permissions Required, Third Party Advisory

Timeline

Published: Dec 15, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4245?

How severe is CVE-2021-4245?

CVE-2021-4245 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.27% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4245?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4245?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST