Frontend DoS vulnerability due to asymmetric resource consumption
Priority LOW 27CWE-405Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
An authenticated Zabbix user (including Guest) is able to cause disproportionate CPU load on the webserver by sending specially crafted parameters to /imgstore.php, leading to potential denial of service.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00364 30th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
No affected products listed by the sources yet.
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:zabbix:frontend:*:*:*:*:*:*:*:* | 6.0.0 to before 6.0.42; 7.0.0 to before 7.0.19; 7.2.0 to before 7.2.13; 7.4.0 to before 7.4.3 | Vulnerable | Zabbix |
- cpe:2.3:a:zabbix:frontend:*:*:*:*:*:*:*:* Versions 6.0.0 to before 6.0.42; 7.0.0 to before 7.0.19; 7.2.0 to before 7.2.13; 7.4.0 to before 7.4.3 Vulnerable ·Zabbix
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2025-49643
- 2026-10-03 Alias added: GHSA-728r-qj99-48p2
References
More Zabbix Frontend vulnerabilities
- TI-2022-21297 X-Forwarded-For header is active by default causes access to Zabbix sites in maintenance mode CVSS 3.1CRITICAL 9.8
- TI-2023-15994 Leak of zbx_session cookie when using a scheduled report that includes a dashboard with a URL widget. CVSS 3.1CRITICAL 9.6
- TI-2025-20084 Frontend arbitrary file read in oauth.authorize action CVSS 4.0MEDIUM 6.8
- TI-2023-13836 Insufficient validation of Action form input fields CVSS 3.1MEDIUM 6.3
- TI-2023-13834 Reflected XSS in several fields of graph form CVSS 3.1MEDIUM 6.1
- TI-2023-14713 DOM XSS in Developer mode dashboard via redirect GET parameter CVSS 3.1MEDIUM 6.1
Sources
- CVE-2025-49643 · CVE Program
- CVE-2025-49643 · NVD
- FIRST EPSS
- GHSA-728r-qj99-48p2 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-49643 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences