Vulnerability Report

CVE-2018-9846

Title: Roundcube Webmail Improper Input Validation

Input Validation Error

Proof Of Concept

No public PoC currently indexed for CVE-2018-9846.

CWE Category CWE-20
Published Date Apr 07, 2018
Modified Date Jun 17, 2026
Exploit Status Not Found
Score 8.8 CVSS v3.0
Exploit Probability (EPSS)
2.29%

Vulnerability Summary

CVE-2018-9846: In Roundcube from versions 1.2.0 to 1.3.5, with the archive plugin enabled and configured, it's possible to exploit the unsanitized, user-controlled "_uid" parameter (in an archive.php _task=mail&_mbox=INBOX&_action=plugin.move2archive request) to perform an MX (IMAP) injection attack by placing an IMAP command after a %0d%0a sequence. NOTE: this is less easily exploitable in 1.3.4 and later because of a Same Origin Policy protection mechanism.

Impacted Vendors

C
cobalt 1
R
roundcube 1
V
vdesk 1

Reference Links

https://github.com/roundcube/roundcubemail/issues/6229 https://github.com/roundcube/roundcubemail/issues/6238 https://medium.com/%40ndrbasi/cve-2018-9846-roundcube-303097048b0a https://www.debian.org/security/2018/dsa-4181 https://github.com/roundcube/roundcubemail/issues/6229 https://github.com/roundcube/roundcubemail/issues/6238 https://medium.com/%40ndrbasi/cve-2018-9846-roundcube-303097048b0a https://www.debian.org/security/2018/dsa-4181
CVSS v3.0
Source Entity [email protected]
Severity HIGH
8.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
6.8
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:M/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2018-9846 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.