CVE-2021-43350

LDAP filter injection vulnerability in Traffic Ops

9.8 CriticalFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

4.76%Up 3.9 points since Nov 12, 2021

What each source reports

NVD Score used 9.8

Record: CVE-2021-43350
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-90, CWE-74
Updated: 2026-11-02

CVE List No score

LDAP filter injection vulnerability in Traffic Ops

Record: CVE-2021-43350
Weakness: CWE-90
Updated: 2026-11-02

EUVDEUVD-2022-4555 No score

Record: EUVD-2022-4555
Updated: 2026-11-03

GitHub AdvisoriesGHSA-mg2c-rc36-p594 9.8

Apache Traffic Control Traffic Ops Vulnerable to LDAP Injection

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.

Record: GHSA-mg2c-rc36-p594
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-74
Updated: 2026-11-02

OSV 9.8

Record: CVE-2021-43350
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-mg2c-rc36-p594 9.8

Apache Traffic Control Traffic Ops Vulnerable to LDAP Injection

Record: GHSA-mg2c-rc36-p594
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-74
Updated: 2026-11-02

OSVGO-2024-2776 No score

Apache Traffic Control Traffic Ops Vulnerable to LDAP Injection in github.com/apache/trafficcontrol

Apache Traffic Control Traffic Ops Vulnerable to LDAP Injection in github.com/apache/trafficcontrol

Record: GO-2024-2776
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`github.com/apache/trafficcontrol` Go	6.0.0 up to 6.0.1	6.0.1
`github.com/apache/trafficcontrol` Go	5.1.0 up to 5.1.4	5.1.4
`github.com/apache/trafficcontrol` Go	5.1.0+incompatible up to 5.1.4+incompatible, 6.0.0+incompatible up to 6.0.1+incompatible	5.1.4+incompatible6.0.1+incompatible

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-43350 is a critical vulnerability (CVSS 9.8) in Apache Traffic Control, published November 11, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.76%, the 91st percentile. Fixed in github.com/apache/trafficcontrol 6.0.1.