CVE-2011-2904

CVE-2011-2904 is a medium-severity vulnerability in Zabbix with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Description

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.

Frequently asked questions

What is CVE-2011-2904?
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.
How severe is CVE-2011-2904?
CVE-2011-2904 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2011-2904 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2904?
CVE-2011-2904 primarily affects Zabbix. In total, 67 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2904?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-2904 published?
CVE-2011-2904 was published on 2011-08-19 and last updated on 2026-06-16.

References

Affected products (67)

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