WP Live Chat Support Pro <= 8.0.26 - Arbitrary File Upload
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | wp-live-chat-support-pro | <= 8.0.26 | 8.0.27 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-434- Platform
- WordPress
- Package
wp-live-chat-support-pro- Disclosed
- 07.05.2019
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 227fb6d1-3515-4172-9d7c-57a66d17858f - Wordfence Intelligence
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Copyright 2012-2026 Defiant Inc.
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Vulnerability history: wp-live-chat-support-pro
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 03.2019 05.2019
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
Disclosures per year
- 2019: 2
- 2020: 0
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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WP Live Chat Support Pro <= 8.0.26 - Arbitrary File Upload this entry
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