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

published 2019-08-02 7y ago modified 2026-06-17 4mo ago also EUVD-2017-9553

cvss: 4.4; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits: 0; none known

Patch / fix

fixed in 1

cpanel cpanel 56.0.49, 58.0.49, 60.0.43, 62.0.24, 64.0.21

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Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	4.4	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
NVD	2.0	3.6	AV:L/AC:L/Au:N/C:P/I:P/A:N

Classification

Weakness

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

documentation.cpanel.net /display/CL/64+Change+Log
release-notes, vendor-advisory
news.cpanel.com /cpanel-tsr-2017-0003-full-disclosure/
vendor-advisory

Sources

CVE List CVE-2017-18437
NVD CVE-2017-18437

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.