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Vulnerability record · CVE-2021-43350 · published 11 November 2021

CVE-2021-43350: Apache traffic control ldap injection vulnerability

Apache · Traffic Control

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.

9.8 CVSS 3.1 Critical EPSS 4.8% · top 8.4% CWE-90 · LDAP injectionCWE-74 · Injection
9.8CVSS 3.1 base score, v2 7.5
4.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2019-12405Apache traffic control improper authentication vulnerabilityImproper authentication is possible in Apache Traffic Control versions 3.0.0 and 3.0.1 if LDAP is enabled for login in the Traffic Ops API component.…EPSS 3.5%8.8CVE-2024-45387Apache traffic control sql injection vulnerabilityAn SQL injection vulnerability in Traffic Ops in Apache Traffic Control <= 8.0.1, >= 8.0.0 allows a privileged user with role "admin", "federation", …EPSS 42%7.5CVE-2025-61581Apache traffic control inefficient regular expression (redos) vulnerability** UNSUPPORTED WHEN ASSIGNED ** Inefficient Regular Expression Complexity vulnerability in Apache Traffic Control. This issue affects Apache Traffic …EPSS 0.74%7.5CVE-2022-23206Apache traffic control server-side request forgery (ssrf) vulnerabilityIn Apache Traffic Control Traffic Ops prior to 6.1.0 or 5.1.6, an unprivileged user who can reach Traffic Ops over HTTPS can send a specially-crafted…EPSS 2.0%7.5CVE-2017-7670Apache traffic control uncontrolled resource consumption vulnerabilityThe Traffic Router component of the incubating Apache Traffic Control project is vulnerable to a Slowloris style Denial of Service attack. TCP connec…EPSS 4.7%5.8CVE-2020-17522Apache traffic control incorrect permission assignment vulnerabilityWhen ORT (now via atstccfg) generates ip_allow.config files in Apache Traffic Control 3.0.0 to 3.1.0 and 4.0.0 to 4.1.0, those files include permissi…EPSS 3.9%4.3CVE-2021-42009Apache traffic control improper input validation vulnerabilityAn authenticated Apache Traffic Control Traffic Ops user with Portal-level privileges can send a request with a specially-crafted email subject to th…EPSS 2.8%7.8CVE-2026-85880Windows ALPC heap buffer overflow allows local privilege escalationA heap-based buffer overflow in the Windows ALPC subsystem, combined with use of an uninitialized resource, lets an attacker with existing local acce…KEVEPSS 3.6%analysed

Source: NIST National Vulnerability Database (record CVE-2021-43350), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.