In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the LDAP search filter was subject to injection via unescaped %u/%fu/%d substitution, which may lead to information disclosure or privilege escalation.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy 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
High
Complete denial of service
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/0893e192adf803c7a5a89fafc8027…
cve@mitre.org
https://github.com/roundcube/roundcubemail/commit/e6cc1e121effeaec6d916feb4e019…
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