Vulnerability · Published Oct 19, 2025 · Assigned by VulDB

CVE-2025-11947bftpd Configuration File options.c expand_groups heap-based overflow

Medium 4.5

In plain English

A medium-severity heap buffer overflow in bftpd. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)4.5Medium

Exploit odds (30 days)0.2%top 92.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
n/a	bftpd	6.06.16.2

Weakness: CWE-122, CWE-119 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-329027 | bftpd Configuration File options.c expand_groups heap-based overflow vdb-entry, technical-description
VDB-329027 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #673133 | bftpd Project bftpd FTP Server 6.2 Heap-based Buffer Overflow third-party-advisory
https://shimo.im/docs/rp3OMVMZZXc9lvkm/ exploit