CVE-2021-43350

Name: CVE-2021-43350
Creator: NVD / NIST
Published: 2021-11-11T13:15:07.737+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.43%

Last modified Jun 17, 2026

CVE-2021-43350 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An unauthenticated Apache Traffic Control Traffic Ops user can send a request with a specially-crafted username to the POST /login endpoint of any API version to inject unsanitized content into the LDAP filter.. EPSS estimates a 4.43% chance of exploitation in the next 30 days.

Description

An unauthenticated Apache Traffic Control Traffic Ops user can send a request with a specially-crafted username to the POST /login endpoint of any API version to inject unsanitized content into the LDAP filter.

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

4.43%

90.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Apache	Traffic Control	>= 5.1.0, < 5.1.4	—
Apache	Traffic Control	>= 6.0.0, < 6.0.1	—
Apache	Traffic Control	5.1.4	Rc0
Apache	Traffic Control	6.0.1	Rc0

References

http://www.openwall.com/lists/oss-security/2021/11/11/3Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/11/11/4Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/11/17/1Mailing List, Third Party Advisory
https://trafficcontrol.apache.org/security/Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/11/11/3Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/11/11/4Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/11/17/1Mailing List, Third Party Advisory
https://trafficcontrol.apache.org/security/Vendor Advisory

Timeline

Published: Nov 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43350?

How severe is CVE-2021-43350?

CVE-2021-43350 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.43% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43350?

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-2021-43350?

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

Scan your code now

Source: NVD / NIST