ZwiiCMS versions prior to 13.7.00 contain a denial-of-service vulnerability in multiple administrative endpoints due to improper authorization checks combined with flawed resource state management. When an authenticated low-privilege user requests an administrative page, the application returns "404 Not Found" as expected, but incorrectly acquires and associates a temporary lock on the targeted resource with the attacker session prior to authorization. This lock prevents other users, including administrators, from accessing the affected functionality until the attacker navigates away or the session is terminated.
Conclusion & alert: CVE-2025-34467 is rated Low Risk (25/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.04%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-29 | 0.06% | 0.04% | -0.02% |
| 2 | 2026-05-02 | 0.03% | 0.06% | +0.02% |
| 3 | 2026-01-01 | — | 0.03% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.3 | 4.0 | MEDIUM |
|
— | — | [email protected] |
| 4.3 | 3.1 | MEDIUM |
|
2.8 | 1.4 | [email protected] |
| URL | Tags |
|---|---|
| https://codeberg.org/fredtempez/ZwiiCMS/releases/tag/13.7.00 | Release Notes |
| https://github.com/fredtempez/ZwiiCMS | Product |
| https://www.vulncheck.com/advisories/zwiicms-lock-persistence-authenticated-dos-against-administrative-pages | Third Party Advisory |