Buffer overflow in Bftpd
CVE-2025-11947
A weakness has been identified in bftpd up to 6.2. Impacted is the function expand_groups of the file options.c of the component Configuration File Handler. Executing a manipulation can lead to heap-based buffer overflow. It is possible to launch the attack on the local host. Attacks of this nature are highly complex. The exploitability is considered difficult. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.5 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (7.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Bftpd — versions 6.0, 6.1, 6.2
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- shimo.im/docs/rp3OMVMZZXc9lvkm/ (exploit)
Frequently asked questions
- What is CVE-2025-11947?
- CVE-2025-11947 is a medium-severity vulnerability in Bftpd, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 4.5/10. Published 2025-10-19.
- How severe is CVE-2025-11947?
- Medium severity. CVSS v3 base score is 4.5 out of 10.