How severe is CVE-2018-5954?

CVE-2018-5954 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-5954 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-5954?

CVE-2018-5954 affects Phpfreechat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-5954?

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

When was CVE-2018-5954 published?

CVE-2018-5954 was published on 2018-01-25 and last updated on 2026-06-17.

CVE-2018-5954

CVE-2018-5954 is a high-severity vulnerability in Phpfreechat with a CVSS 3.x base score of 7.5. 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Phpfreechat
Published: 2018-01-25
Last modified: 2026-06-17

Description

phpFreeChat 1.7 and earlier allows remote attackers to cause a denial of service by sending a large number of connect commands.

Frequently asked questions

What is CVE-2018-5954?: phpFreeChat 1.7 and earlier allows remote attackers to cause a denial of service by sending a large number of connect commands.
How severe is CVE-2018-5954?: CVE-2018-5954 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-5954 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-5954?: CVE-2018-5954 affects Phpfreechat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-5954?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-5954 published?: CVE-2018-5954 was published on 2018-01-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phpfreechat:phpfreechat:*:*:*:*:*:*:*:*

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