How severe is CVE-2018-14399?

CVE-2018-14399 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-2018-14399 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-14399?

CVE-2018-14399 affects Phpcms Project Phpcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-14399?

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-2018-14399 published?

CVE-2018-14399 was published on 2018-07-19 and last updated on 2026-06-17.

CVE-2018-14399

CVE-2018-14399 is a critical-severity vulnerability in Phpcms Project Phpcms 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% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Phpcms Project Phpcms
Published: 2018-07-19
Last modified: 2026-06-17

Description

libs\classes\attachment.class.php in PHPCMS 9.6.0 allows remote attackers to upload and execute arbitrary PHP code via a .txt?.php#.jpg URI in the SRC attribute of an IMG element within info[content] JSON data to the index.php?m=member&c=index&a=register URI.

Frequently asked questions

What is CVE-2018-14399?: libs\classes\attachment.class.php in PHPCMS 9.6.0 allows remote attackers to upload and execute arbitrary PHP code via a .txt?.php#.jpg URI in the SRC attribute of an IMG element within info[content] JSON data to the index.php?m=member&c=index&a=register URI.
How severe is CVE-2018-14399?: CVE-2018-14399 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-2018-14399 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-14399?: CVE-2018-14399 affects Phpcms Project Phpcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-14399?: 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-2018-14399 published?: CVE-2018-14399 was published on 2018-07-19 and last updated on 2026-06-17.

References

http://www.an-sheng.cc/index.php/archives/4/

Affected products (1)

cpe:2.3:a:phpcms_project:phpcms:9.6.0:*:*:*:*:*:*:*

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