CVE-2025-27889Public exploitNetwork attack vector

Cleartext password theft via arbitrary link injection

Published Jul 10, 2025 · Updated Jul 10, 2025

URL redirection in Wing FTP Server before 7.4.4 allows remote attackers to steal cleartext passwords through crafted links. The downloadpass.html endpoint accepts an unvalidated url value and appends the victim's entered password to that attacker-controlled destination. Exploitation requires the victim to open the crafted link, enter a weblink password, and submit the form; disclosure can enable account compromise.

CVSS severity7.0
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

URL redirection in Wing FTP Server before 7.4.4 allows remote attackers to steal cleartext passwords through crafted links. The downloadpass.html endpoint accepts an unvalidated url value and appends the victim's entered password to that attacker-controlled destination. Exploitation requires the victim to open the crafted link, enter a weblink password, and submit the form; disclosure can enable account compromise.

The record

CVE
CVE-2025-27889
Published
Jul 10, 2025
Updated
Jul 10, 2025
Vendor
Wing Soft Technology
Product
Wing FTP Server
Classifications
CWE-601, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <7.4.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wing Soft Technology · Wing FTP Serverversion=0 <7.4.4

Published CVSS scores

7.0RCE SecurityCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo