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Vulnerability record · CVE-2026-42167 · published 28 April 2026

CVE-2026-42167: Proftpd sql injection vulnerability

PProftpd · Proftpd

mod_sql in ProFTPD before 1.3.9a allows remote attackers to execute arbitrary code via a username, in scenarios where there is logging of USER requests with an expansion such as %U, and the SQL backend allows commands (e.g., COPY TO PROGRAM).

8.1 CVSS 3.1 High EPSS 7.3% · top 5.8% CWE-89 · SQL injection
8.1CVSS 3.1 base score
7.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 4 tagged exploit
24 Jul 2026Last modified by NVD

Description

mod_sql in ProFTPD before 1.3.9a allows remote attackers to execute arbitrary code via a username, in scenarios where there is logging of USER requests with an expansion such as %U, and the SQL backend allows commands (e.g., COPY TO PROGRAM).

CVSS:3.1/AV:N/AC:H/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.proftpd.org/docs/RELEASE_NOTES-1.3.10rc1 Release Notes
https://github.com/ZeroPathAI/proftpd-CVE-2026-42167-poc ExploitThird Party Advisory
https://github.com/proftpd/proftpd/issues/2052 ExploitIssue TrackingPatch
https://www.openwall.com/lists/oss-security/2026/05/01/4 Mailing List
https://zeropath.com/blog/proftpd-cve-2026-42167-auth-bypass-privesc-rce ExploitPress/Media CoverageThird Party Advisory
http://www.openwall.com/lists/oss-security/2026/05/01/13 Mailing List
http://www.openwall.com/lists/oss-security/2026/05/01/4 Mailing List
https://github.com/ZeroPathAI/proftpd-CVE-2026-42167-poc ExploitThird Party Advisory

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Related vulnerabilities

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

10.0CVE-2015-3306ProFTPD mod_copy arbitrary file read and writeThe mod_copy module in ProFTPD 1.3.5 fails to restrict the SITE CPFR and SITE CPTO commands, letting remote attackers copy arbitrary files on the ser…EPSS 97%analysed10.0CVE-2010-4221ProFTPD TELNET IAC handling stack buffer overflow allows remote code executionProFTPD before 1.3.3c contains multiple stack-based buffer overflows in the pr_netio_telnet_gets function in netio.c. A remote attacker can trigger t…EPSS 91%analysed9.8CVE-2019-12815ProFTPD mod_copy arbitrary file copy enables unauthenticated RCEmod_copy in ProFTPD up to 1.3.5b performs an arbitrary file copy without validating the source or destination, letting an unauthenticated remote clie…EPSS 58%analysed9.3CVE-2010-20103Proftpd vulnerabilityA malicious backdoor was embedded in the official ProFTPD 1.3.3c source tarball distributed between November 28 and December 2, 2010. The backdoor im…EPSS 5.1%9.0CVE-2011-4130Proftpd vulnerabilityUse-after-free vulnerability in the Response API in ProFTPD before 1.3.3g allows remote authenticated users to execute arbitrary code via vectors inv…EPSS 13%8.8CVE-2020-9273Proftpd use after free vulnerabilityIn ProFTPD 1.3.7, it is possible to corrupt the memory pool by interrupting the data transfer channel. This triggers a use-after-free in alloc_pool i…EPSS 12%8.7CVE-2026-63090Proftpd heap-based buffer overflow vulnerabilityProFTPD before 1.3.9c and 1.3.10rc3 contains a heap-based buffer overflow vulnerability in the mod_sftp module that allows authenticated low-privileg…EPSS 0.93%8.6CVE-2026-35025Proftpd link following vulnerabilityProFTPD through 1.3.9b and 1.3.10rc2 contains an access control bypass vulnerability that allows authenticated FTP users to circumvent Directory ACL …EPSS 0.51%

Source: NIST National Vulnerability Database (record CVE-2026-42167), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.