In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, mail search and LITERAL+ byte-count desynchronization could lead to information disclosure or privilege escalation via IMAP command injection.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 2
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Roundcube Webmail
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
|
1.6.0
|
1.6.18
|
|
Roundcube Webmail
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
|
1.7.0
|
1.7.3
|
References 5
https://github.com/roundcube/roundcubemail/commit/404d43f1b0125319c3cf8c9e3df39…
cve@mitre.org
https://github.com/roundcube/roundcubemail/commit/73233abe581b3b31cefd00041c708…
cve@mitre.org
https://github.com/roundcube/roundcubemail/releases/tag/1.6.18
cve@mitre.org
https://github.com/roundcube/roundcubemail/releases/tag/1.7.3
cve@mitre.org
https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3
cve@mitre.org