How severe is CVE-2018-14940?

CVE-2018-14940 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-2018-14940 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-14940?

CVE-2018-14940 affects Phpcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-14940?

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-2018-14940 published?

CVE-2018-14940 was published on 2018-08-05 and last updated on 2026-06-17.

CVE-2018-14940

CVE-2018-14940 is a high-severity vulnerability in Phpcms 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: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Phpcms
Published: 2018-08-05
Last modified: 2026-06-17

Description

PHPCMS 9 allows remote attackers to cause a denial of service (resource consumption) via large font_size, height, and width parameters in an api.php?op=checkcode request.

Frequently asked questions

What is CVE-2018-14940?: PHPCMS 9 allows remote attackers to cause a denial of service (resource consumption) via large font_size, height, and width parameters in an api.php?op=checkcode request.
How severe is CVE-2018-14940?: CVE-2018-14940 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-2018-14940 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-14940?: CVE-2018-14940 affects Phpcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-14940?: 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-2018-14940 published?: CVE-2018-14940 was published on 2018-08-05 and last updated on 2026-06-17.

References

https://github.com/m0us3Sun/PHPCMS-v9/issues/1

Affected products (1)

cpe:2.3:a:phpcms:phpcms:9.0:*:*:*:*:*:*:*

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