Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13 allows Cascading Style Sheets (CSS) injection, e.g., because comments are mishandled.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 9
https://github.com/roundcube/roundcubemail/commit/1f4c3a5af5033747f9685a8a395db…
cve@mitre.org
https://github.com/roundcube/roundcubemail/commit/2b5625f1d2ef7e050fd1ae481b2a5…
cve@mitre.org
https://github.com/roundcube/roundcubemail/commit/53d75d5dfebef235a344d476b900c…
cve@mitre.org
https://github.com/roundcube/roundcubemail/commit/5a3315cce587e0be58335d11ff9a5…
cve@mitre.org
https://github.com/roundcube/roundcubemail/commit/bf89cbaa5897d8ad62e8057d9a3f6…
cve@mitre.org
https://github.com/roundcube/roundcubemail/commit/c15f5dbf093a497e19a749b20e7f8…
cve@mitre.org
https://github.com/roundcube/roundcubemail/releases/tag/1.5.13
cve@mitre.org
https://github.com/roundcube/roundcubemail/releases/tag/1.6.13
cve@mitre.org
https://roundcube.net/news/2026/02/08/security-updates-1.6.13-and-1.5.13
cve@mitre.org