CVE-2011-2904

4.3 MEDIUM 2% exploit odds Fix listed

What it is

Cross-site scripting (XSS) vulnerability in acknow.php in Zabbix before 1.8.6 allows remote attackers to inject arbitrary web script or HTML via the backurl parameter.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 2.0% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2011-08-19 21:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:32 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 2.0% in the next 30 days (EPSS).
Severity: 4.3 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2011-08-19 21:55 UTC
Last modified: 2026-06-16 23:32 UTC
Exploit probability: 2.0% · EPSS, next 30 days
Weakness: CWE-79 · Cross-site scripting
Record status: Modified

Affected

Zabbix ≤ 1.8.5
Zabbix 1.1
Zabbix 1.1.1
Zabbix 1.1.2
Zabbix 1.1.3
Zabbix 1.1.4
Zabbix 1.1.5
Zabbix 1.1.6

Attack profile CVSS 2.0 · 4.3

Attack vector: Network
Complexity: Medium
Authentication: None
Confidentiality: None
Integrity: Partial
Availability: None

Raw vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2011-2904.md and follow it. Check whether this project is affected by CVE-2011-2904. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record