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CVE-2025-49643

Frontend DoS vulnerability due to asymmetric resource consumption

6.0 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Adjacent network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.36%Up 0.3 points since Dec 2, 2025
90%50%10%1%

What each source reports

CVE List Score used 6.0

Frontend DoS vulnerability due to asymmetric resource consumption

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.

Record
CVE-2025-49643
CVSS 4.0
6.0 MediumCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-405
Updated
2026-11-02
EUVDEUVD-2025-199985 6.0

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.

Record
EUVD-2025-199985
CVSS 4.0
6.0 MediumCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-728r-qj99-48p2 6.0

An authenticated Zabbix user (including Guest) is able to cause disproportionate CPU load on the...

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.

Record
GHSA-728r-qj99-48p2
CVSS 4.0
6.0 MediumCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-405
Updated
2026-11-02
NVD 6.0

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.

Record
CVE-2025-49643
CVSS 4.0
6.0 MediumCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-405
Updated
2026-11-02
OSVALPINE-CVE-2025-49643 6.5

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.

Record
ALPINE-CVE-2025-49643
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
OSV 6.5

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.

Record
CVE-2025-49643
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2025-49643 6.5

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.

Record
DEBIAN-CVE-2025-49643
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2025-49643 6.0

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.

Record
UBUNTU-CVE-2025-49643
CVSS 4.0
6.0 MediumCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
zabbix
Alpine:v3.22
 before 7.2.13-r0
7.2.13-r0
zabbix
Alpine:v3.23
 before 7.4.3-r0
7.4.3-r0
zabbix
Alpine:v3.24
 before 7.4.3-r0
7.4.3-r0
zabbix
Debian:12
 All versions, plus listed versions
1:6.0.14+dfsg-11:6.0.23+dfsg-11:6.0.23+dfsg-1~bpo12+11:6.0.24+dfsg-11:6.0.25+dfsg-1
Show 23 moreShow less
1:6.0.29+dfsg-11:7.0.0+dfsg-11:7.0.0+dfsg-21:7.0.0+dfsg-2~bpo12+11:7.0.1+dfsg-11:7.0.1+dfsg-1~bpo12+11:7.0.10+dfsg-11:7.0.10+dfsg-21:7.0.2+dfsg-11:7.0.2+dfsg-1~bpo12+11:7.0.22+dfsg-11:7.0.22+dfsg-1.11:7.0.22+dfsg-1~bpo13+11:7.0.22+dfsg-1~deb13u11:7.0.27+dfsg-11:7.0.29+dfsg-11:7.0.29+dfsg-21:7.0.3+dfsg-11:7.0.5+dfsg-11:7.0.5+dfsg-1~bpo12+11:7.0.6+dfsg-11:7.0.9+dfsg-11:7.0.9+dfsg-1~bpo12+1
 None known
zabbix
Debian:13
 before 1:7.0.22+dfsg-1~deb13u1, plus listed versions
1:7.0.10+dfsg-21:7.0.22+dfsg-1~bpo13+1
1:7.0.22+dfsg-1~deb13u1
zabbix
Debian:14
 before 1:7.0.22+dfsg-1, plus listed versions
1:7.0.10+dfsg-21:7.0.22+dfsg-1~bpo13+11:7.0.22+dfsg-1~deb13u1
1:7.0.22+dfsg-1
zabbix
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
1:2.0.6+dfsg-1ubuntu21:2.2.0+dfsg-1ubuntu11:2.2.0+dfsg-6ubuntu11:2.2.1+dfsg-1ubuntu31:2.2.2+dfsg-1ubuntu1
Show 4 moreShow less
1:2.2.2+dfsg-1ubuntu1+esm11:2.2.2+dfsg-1ubuntu1+esm31:2.2.2+dfsg-1ubuntu1+esm41:2.2.2+dfsg-1ubuntu1+esm5
 None known
zabbix
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1:2.4.6+dfsg-11:2.4.7+dfsg-11:2.4.7+dfsg-21:2.4.7+dfsg-2ubuntu21:2.4.7+dfsg-2ubuntu2.1
Show 4 moreShow less
1:2.4.7+dfsg-2ubuntu2.1+esm11:2.4.7+dfsg-2ubuntu2.1+esm21:2.4.7+dfsg-2ubuntu2.1+esm31:2.4.7+dfsg-2ubuntu2.1+esm4
 None known
zabbix
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
1:3.0.7+dfsg-31:3.0.12+dfsg-11:3.0.12+dfsg-1ubuntu0.1~esm11:3.0.12+dfsg-1ubuntu0.1~esm21:3.0.12+dfsg-1ubuntu0.1~esm31:3.0.12+dfsg-1ubuntu0.1~esm4
 None known
zabbix
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
1:4.0.4+dfsg-1build21:4.0.4+dfsg-1build31:4.0.11+dfsg-11:4.0.14+dfsg-11:4.0.15+dfsg-1
Show 5 moreShow less
1:4.0.16+dfsg-11:4.0.16+dfsg-1build11:4.0.17+dfsg-11:4.0.17+dfsg-1ubuntu0.1~esm11:4.0.17+dfsg-1ubuntu0.1~esm2
 None known
Show 4 moreShow less
Affected packages
PackageAffectedFixed
zabbix
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
1:5.0.8+dfsg-1build11:5.0.14+dfsg-11:5.0.17+dfsg-11:5.0.17+dfsg-1ubuntu0.1~esm1
 None known
zabbix
Ubuntu:25.10
 All versions, plus listed versions
1:7.0.10+dfsg-21:7.0.10+dfsg-2build1
 None known
zabbix
Ubuntu:26.10
 All versions, plus listed versions
1:7.0.22+dfsg-11:7.0.22+dfsg-1.11:7.0.22+dfsg-1.1build11:7.0.22+dfsg-1.1build21:7.0.27+dfsg-1
 None known
zabbix
Ubuntu:26.04:LTS
 All versions, plus listed versions
1:7.0.10+dfsg-2build11:7.0.22+dfsg-1
 None known

History

History
RecordedChangedSources
affected, aliases, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-49643 is a medium vulnerability (CVSS 6.0) in Zabbix Frontend, published December 1, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.36%, the 30th percentile. Fixed in zabbix 7.2.13-r0.

References

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