How severe is CVE-2019-11185?

CVE-2019-11185 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-2019-11185 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-11185?

CVE-2019-11185 affects 3cx Live Chat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-11185?

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-2019-11185 published?

CVE-2019-11185 was published on 2019-06-03 and last updated on 2026-06-17.

CVE-2019-11185

CVE-2019-11185 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: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: 3cx Live Chat
Published: 2019-06-03
Last modified: 2026-06-17

Description

The WP Live Chat Support Pro plugin through 8.0.26 for WordPress contains an arbitrary file upload vulnerability. This results from an incomplete patch for CVE-2018-12426. Arbitrary file upload is achieved by using a non-blacklisted executable file extension in conjunction with a whitelisted file extension, and prepending "magic bytes" to the payload to pass MIME checks. Specifically, an unauthenticated remote user submits a crafted file upload POST request to the REST api remote_upload endpoint. The file contains data that will fool the plugin's MIME check into classifying it as an image (which is a whitelisted file extension) and finally a trailing .phtml file extension.

Frequently asked questions

What is CVE-2019-11185?: The WP Live Chat Support Pro plugin through 8.0.26 for WordPress contains an arbitrary file upload vulnerability. This results from an incomplete patch for CVE-2018-12426. Arbitrary file upload is achieved by using a non-blacklisted executable file extension in conjunction with a whitelisted file extension, and prepending "magic bytes" to the payload to pass MIME checks. Specifically, an unauthenticated remote user submits a crafted file upload POST request to the REST api remote_upload endpoint. The file contains data that will fool the plugin's MIME check into classifying it as an image (which is a whitelisted file extension) and finally a trailing .phtml file extension.
How severe is CVE-2019-11185?: CVE-2019-11185 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-2019-11185 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-11185?: CVE-2019-11185 affects 3cx Live Chat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-11185?: 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-2019-11185 published?: CVE-2019-11185 was published on 2019-06-03 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in 3cx Live Chat

CVE-2019-12498 — Critical (CVSS 9.8): The WP Live Chat Support plugin before 8.0.33 for WordPress accepts certain REST API calls without invoking the…
CVE-2018-12426 — Critical (CVSS 9.8): The WP Live Chat Support Pro plugin before 8.0.07 for WordPress is vulnerable to unauthenticated Remote Code Execution…
CVE-2014-10386 — Medium (CVSS 6.1): The wp-live-chat-support plugin before 4.1.0 for WordPress has JavaScript injections.
CVE-2017-18507 — Medium (CVSS 6.1): The wp-live-chat-support plugin before 7.1.05 for WordPress has XSS.
CVE-2019-14950 — Medium (CVSS 6.1): The wp-live-chat-support plugin before 8.0.27 for WordPress has XSS via the GDPR page.
CVE-2017-18508 — Medium (CVSS 6.1): The wp-live-chat-support plugin before 7.1.03 for WordPress has XSS.

All CVEs affecting 3cx Live Chat →

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