How severe is CVE-2018-12426?

CVE-2018-12426 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-2018-12426 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-12426?

CVE-2018-12426 affects 3cx Live Chat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-12426?

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-2018-12426 published?

CVE-2018-12426 was published on 2018-07-02 and last updated on 2026-06-17.

CVE-2018-12426

CVE-2018-12426 is a critical-severity vulnerability in 3cx Live Chat 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: 3cx Live Chat
Published: 2018-07-02
Last modified: 2026-06-17

Description

The WP Live Chat Support Pro plugin before 8.0.07 for WordPress is vulnerable to unauthenticated Remote Code Execution due to client-side validation of allowed file types, as demonstrated by a v1/remote_upload request with a .php filename and the image/jpeg content type.

Frequently asked questions

What is CVE-2018-12426?: The WP Live Chat Support Pro plugin before 8.0.07 for WordPress is vulnerable to unauthenticated Remote Code Execution due to client-side validation of allowed file types, as demonstrated by a v1/remote_upload request with a .php filename and the image/jpeg content type.
How severe is CVE-2018-12426?: CVE-2018-12426 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-2018-12426 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-12426?: CVE-2018-12426 affects 3cx Live Chat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-12426?: 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-2018-12426 published?: CVE-2018-12426 was published on 2018-07-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:3cx:live_chat:*:*:*:*:*:wordpress:*:*

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