How severe is CVE-2018-18921?

CVE-2018-18921 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-18921 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18921?

CVE-2018-18921 affects Phpservermonitor Php Server Monitor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18921?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-18921 published?

CVE-2018-18921 was published on 2018-12-18 and last updated on 2026-06-17.

CVE-2018-18921

CVE-2018-18921 is a medium-severity vulnerability in Phpservermonitor Php Server Monitor with a CVSS 3.x base score of 6.5. 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 5.8
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Phpservermonitor Php Server Monitor
Published: 2018-12-18
Last modified: 2026-06-17

Description

PHP Server Monitor before 3.3.2 has CSRF, as demonstrated by a Delete action.

Frequently asked questions

What is CVE-2018-18921?: PHP Server Monitor before 3.3.2 has CSRF, as demonstrated by a Delete action.
How severe is CVE-2018-18921?: CVE-2018-18921 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-18921 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18921?: CVE-2018-18921 affects Phpservermonitor Php Server Monitor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18921?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-18921 published?: CVE-2018-18921 was published on 2018-12-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phpservermonitor:php_server_monitor:*:*:*:*:*:*:*:*

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