Description
An issue was discovered in Roundcube Webmail before 1.3.12 and 1.4.x before 1.4.5. include/rcmail_output_html.php allows XSS via the username template object.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | roundcube | 1.4.5+dfsg.1-1 | — |
| Debian 13 | roundcube | 1.4.5+dfsg.1-1 | — |
| Debian 12 | roundcube | 1.4.5+dfsg.1-1 | — |
| Debian 10 | roundcube | 1.3.13+dfsg.1-1~deb10u1 | DSA-4700-1 |
| Debian 9 | roundcube | 1.2.3+dfsg.1-4+deb9u5 | DSA-4700-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | roundcube | 1.5.0+dfsg.1-2ubuntu0.1~esm1 | USN-5182-1 |
| Ubuntu Pro 20.04 LTS | roundcube | 1.4.3+dfsg.1-1ubuntu0.1~esm1 | USN-5182-1 |
| Ubuntu Pro 18.04 LTS | roundcube | 1.3.6+dfsg.1-1ubuntu0.1~esm2 | USN-5182-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | roundcube | 1.2~beta+dfsg.1-0ubuntu1+esm2 | USN-5182-1 |
Advisories 2
- USN-5182-1 roundcube vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-4700-1 roundcube - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://github.com/roundcube/roundcubemail/releases/tag/1.4.5
- https://github.com/roundcube/roundcubemail/commit/37e2bc745723ef6322f0f785aefd0b9313a40f19
- https://github.com/roundcube/roundcubemail/releases/tag/1.3.12
- https://roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12
- DSA-4700 vendor-advisory
- FEDORA-2020-2a1a6a8432 vendor-advisory
- FEDORA-2020-aeffd92b77 vendor-advisory