SQL Injection in Proftpd
CVE-2026-42167
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).
Vulnerability class: SQL Injection
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.073 (94.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.074 · newest: 0.073 · change: -0.001
Affected products
- Proftpd — versions 1.3.7b
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.proftpd.org/docs/RELEASE_NOTES-1.3.10rc1 (Release Notes)
- github.com/proftpd/proftpd/issues/2052 (Exploit, Patch, Issue Tracking)
- zeropath.com/blog/proftpd-cve-2026-42167-auth-bypass-privesc-rce (Exploit, Third Party Advisory, Press/Media Coverage)
- github.com/ZeroPathAI/proftpd-CVE-2026-42167-poc (Exploit, Third Party Advisory)
- www.openwall.com/lists/oss-security/2026/05/01/4 (Mailing List)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List)
Frequently asked questions
- What is CVE-2026-42167?
- CVE-2026-42167 is a high-severity vulnerability in Proftpd, classified under SQL Injection. CVSS score: 8.1/10. Published 2026-04-28.
- How severe is CVE-2026-42167?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2026-42167 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.