Description
In Horde Groupware 5.2.19-5.2.22, there is XSS via the URL field in a "Calendar -> New Event" action.
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 12 | php-horde-kronolith | 4.2.24-1 | — |
| Debian 9 | php-horde-kronolith | 4.2.19-1+deb9u2 | DLA-2351-1 |
| Debian 8 | php-horde-kronolith | 4.2.2-4+deb8u1 | DLA-1537-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | php-horde-kronolith | No fix yet | — |
| Ubuntu 16.04 LTS | php-horde-kronolith | No fix yet | — |
Advisories 2
- DLA-2351-1 php-horde-kronolith - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1537-1 php-horde-kronolith - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://code610.blogspot.com/2017/11/rce-via-xss-horde-5219.html
- https://github.com/horde/kronolith/commit/09d90141292f9ec516a7a2007bf828ce2bbdf60d
- https://github.com/starnightcyber/Miscellaneous/blob/master/Horde/README.md
- [debian-lts-announce] 20200829 [SECURITY] [DLA 2351-1] php-horde-kronolith security update mailing-list