CVE-2018-18249 Code injection in n/a

What is CVE-2018-18249?

CVE-2018-18249 is a critical code injection vulnerability in n/a, published on 17 Dec 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Icinga Web 2 before 2.6.2 allows injection of PHP ini-file directives via vectors involving environment variables as the channel to send information to the attacker, such as a name=${PATH}_${APACHE_RUN_DIR}_${APACHE_RUN_USER} parameter to /icingaweb2/navigation/add or /icingaweb2/dashboard/new-dashlet.

Weakness: CWE-94

Which versions are affected by CVE-2018-18249?

It affects 1 product.

Products include Icinga Icinga Web 2.

How do I fix CVE-2018-18249?

Upgrade to a fixed version.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2018-18249 being exploited?

There is no known exploitation of CVE-2018-18249 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2022-24715 Arbitrary code execution for authenticated users in Icinga Web 2 High 8.5
• CVE-2025-27404 Icinga Web 2 DOM-based XSS vulnerability High 7.7
• CVE-2025-27405 Icinga Web 2 has XSS in embedded content High 7.7
• CVE-2022-24716 Path traversal in Icinga Web 2 High 7.5
• CVE-2018-18250 Other in n/a High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-18249, GHSA-h88r-wm6r-9ghp, UBUNTU-CVE-2018-18249.