What’s Vulnerable › Vulnerabilities

CVE-2017-18437

• Severity: medium (CVSS 4.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-08-02 · updated 2026-06-17
• Weakness: CWE-74

Description

cPanel before 64.0.21 allows a Webmail account to execute code via forwarders (SEC-240).

Affected products

• WebPros cPanel: from 55.9999.61 before 56.0.49; from 57.9999.48 before 58.0.49; from 59.9999.58 before 60.0.43; from 61.9999.55 before 62.0.24; from 63.9999.74 before 64.0.21 — fixed in 56.0.49, 58.0.49, 60.0.43, 62.0.24, 64.0.21

How to fix

Upgrade to a fixed version: WebPros cPanel 56.0.49, 58.0.49, 60.0.43, 62.0.24. Check the vendor advisory for mitigations.

References

• https://documentation.cpanel.net/display/CL/64+Change+Log
• https://news.cpanel.com/cpanel-tsr-2017-0003-full-disclosure/
• https://documentation.cpanel.net/display/CL/64+Change+Log

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