Vulnerability · CVE-2025-49643
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 pote
Published Dec 1, 2025 · catalog updated Dec 1, 2025 · Zabbix Zabbix
Last checked Oct 28, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-49643. EPSS is 0.34%. Act only if a listed version of Zabbix Zabbix is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2025-49642 · Medium
- CVE-2025-27232 · Medium
- CVE-2025-27237 · High
- CVE-2025-27240 · High
- CVE-2025-27238 · Low
- Severity
- Medium6.0
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.34%
- Remediation
- Vendor / distro source
- Affected products
- vendor Zabbix Zabbix 7.4.0 ≤7.4.2
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Zabbix Zabbix 7.4.0 ≤7.4.27.4.0 ≤7.4.2
How to fix CVE-2025-49643
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
Seen in 7.4.0 ≤7.4.2
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-49643. EPSS is 0.34%. Act only if a listed version of Zabbix Zabbix is installed.
Which versions are affected?
Compare what you have installed with Zabbix Zabbix 7.4.0 ≤7.4.2 7.4.0 ≤7.4.2. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.34%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Dec 1, 2025 · EUVD
Detected
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.
Dec 1, 2025 · EUVD
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2025-49643
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-49643
30-day exploitation probability 0.34%
first.org - EUVDVulnerability recordEUVD-2025-199985
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.
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 28, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 28, 2026
- CVE.orgOct 28, 2026
- EUVDOct 28, 2026