How severe is CVE-2018-18249?

CVE-2018-18249 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-18249 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18249?

CVE-2018-18249 affects Icinga Icinga Web 2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18249?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-18249 published?

CVE-2018-18249 was published on 2018-12-17 and last updated on 2026-06-17.

CVE-2018-18249

CVE-2018-18249 is a critical-severity vulnerability in Icinga Icinga Web 2 with a CVSS 3.x base score of 9.8. 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-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Icinga Icinga Web 2
Published: 2018-12-17
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2018-18249?: 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.
How severe is CVE-2018-18249?: CVE-2018-18249 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-18249 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18249?: CVE-2018-18249 affects Icinga Icinga Web 2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18249?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-18249 published?: CVE-2018-18249 was published on 2018-12-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:icinga:icinga_web_2:*:*:*:*:*:*:*:*

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