CVE-2025-59116: Windu CMS is vulnerable to User Enumeration

Routine

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2025-59116 is a medium-severity flaw (CVSS 5.3) affecting windu cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Windu CMS is vulnerable to User Enumeration. This issue occurs during logon, where a difference in messages could allow an attacker to determine if the login is valid or not, enabling a brute force attack with valid logins. Only version 4.1 was tested and confirmed as vulnerable. This issue was fixed in version 4.1 build 2250.

Why this priority

Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-204
Published	2025-11-18
Last modified	2026-10-18

Publisher (CNA): CERT.PL · Vendor: windu

Last updated 2026-10-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-18 15:16 UTCPublished CVE record published
2026-10-18 20:10 UTCUpdated Record last modified

windu windu cms DOWNGRADE

Affected: 4.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.1

1. Check installed version

apt-cache policy windu-cms || rpm -q windu-cms || windu-cms --version

2. No fixed release: DOWNGRADE to a release before 4.1 (Debian / Ubuntu)

apt-cache madison windu-cms sudo apt install windu-cms=<VERSION_BEFORE_4.1> sudo apt-mark hold windu-cms

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list windu-cms sudo dnf downgrade windu-cms-<VERSION_BEFORE_4.1> sudo dnf versionlock add windu-cms

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-59116?

windu cms: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-59116 being exploited?

CVE-2025-59116 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-59116 affect?

CVE-2025-59116 affects windu cms. Severity is medium (CVSS 5.3). Windu CMS is vulnerable to User Enumeration. This issue occurs during logon, where a difference in messages could allow an attacker to determine if the login is valid or not, enabling a brute force attack with valid logins. Only version 4.

How urgent is CVE-2025-59116?

Priority 28/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-59113 HIGH 7.5 DOWNGRADE Windu CMS implements weak client-side brute-force protection by using parameter loginError. Information about
CVE-2025-59111 MEDIUM 6.5 DOWNGRADE Windu CMS is vulnerable to Broken Access Control in user editing functionality
CVE-2025-59110 MEDIUM 6.5 DOWNGRADE Windu CMS is vulnerable to Cross-Site Request Forgery in user editing functionality
CVE-2025-59112 MEDIUM 6.5 DOWNGRADE Windu CMS is vulnerable to Cross-Site Request Forgery in user editing functionality
CVE-2025-59114 MEDIUM 6.5 DOWNGRADE Windu CMS is vulnerable to Cross-Site Request Forgery in file uploading functionality

References

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