What’s Vulnerable › Vulnerabilities

CVE-2024-42330: JS - Internal strings in HTTP headers

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-11-27 · updated 2026-06-17
• Weakness: CWE-134

Description

The HttpRequest object allows to get the HTTP headers from the server's response after sending the request. The problem is that the returned strings are created directly from the data returned by the server and are not correctly encoded for JavaScript. This allows to create internal strings that can be used to access hidden properties of objects.

Affected products

• Zabbix: from 5.0.0 before 5.4.6; from 6.0.0 before 6.0.34; from 6.4.0 before 6.4.19; from 7.0.0 before 7.0.4 — fixed in 5.4.6, 6.0.34, 6.4.19, 7.0.4

How to fix

Upgrade to a fixed version: Zabbix 5.4.6, 6.0.34, 6.4.19, 7.0.4. Check the vendor advisory for mitigations.

References

• https://support.zabbix.com/browse/ZBX-25626
• https://lists.debian.org/debian-lts-announce/2024/12/msg00005.html

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