CVE-2025-59115: Windu CMS is vulnerable to Stored Cross-Site Scripting (XSS) in the logon page where input data has no proper

Routine

MEDIUM 5.4DOWNGRADE

CVE-2025-59115 is a medium-severity flaw (CVSS 5.4) 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 Stored Cross-Site Scripting (XSS) in the logon page where input data has no proper validation. Malicious attacker can inject arbitrary HTML and JS into website, which will be rendered/executed when visiting logs page by admin. Only version 4.1 was tested and confirmed as vulnerable. This issue was fixed in version 4.1 build 2250.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-79
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-2025-59115?

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

Is CVE-2025-59115 being exploited?

CVE-2025-59115 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-2025-59115 affect?

CVE-2025-59115 affects windu cms. Severity is medium (CVSS 5.4). Windu CMS is vulnerable to Stored Cross-Site Scripting (XSS) in the logon page where input data has no proper validation. Malicious attacker can inject arbitrary HTML and JS into website, which will be rendered/executed when visiting logs p

How urgent is CVE-2025-59115?

Priority 21/100. No elevated risk signals yet.

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-2025-59116 MEDIUM 5.3 DOWNGRADE Windu CMS is vulnerable to User Enumeration
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

References

← Back to latest CVEs