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CVE-2025-47812: Wing FTP Server Improper Neutralization of Null Byte or NUL Character Vulnerability

criticalknown exploitedpublic exploitCVE-2025-47812
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Wing FTP Server contains an improper neutralization of null byte or NUL character vulnerability that can allow injection of arbitrary Lua code into user session files. This can be used to execute arbitrary system commands with the privileges of the FTP service (root or SYSTEM by default).

CSIRTS triage

vendor: Wing FTPproduct: Wing FTP ServerCode injection
What
Wing FTP Server contains an improper neutralization of null byte or NUL character vulnerability that can allow injection of arbitrary Lua code into user session files.
Who is affected
Deployments of Wing FTP Server that are using vulnerable versions.
Urgency
Immediate action is required as this vulnerability is critical and has been exploited.
Action
Update to the latest version of Wing FTP Server to mitigate this issue.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-07-14
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-47812

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-47812coverage & exploitation statusNVD · CVE.org

Recent advisories for Wing FTP Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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