CVE-2018-9846

high
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
8.0

Description

In Roundcube from versions 1.2.0 to 1.3.5, with the archive plugin enabled and configured, it's possible to exploit the unsanitized, user-controlled "_uid" parameter (in an archive.php _task=mail&_mbox=INBOX&_action=plugin.move2archive request) to perform an MX (IMAP) injection attack by placing an IMAP command after a %0d%0a sequence. NOTE: this is less easily exploitable in 1.3.4 and later because of a Same Origin Policy protection mechanism.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2018-9846

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201804-8

OS impact

OSVersionStatusFixed in
arch archfixed1.3.6-1
debian debianbookwormfixed1.3.6+dfsg.1-1
debian debianbullseyefixed1.3.6+dfsg.1-1
debian debiansidfixed1.3.6+dfsg.1-1
debian debiantrixiefixed1.3.6+dfsg.1-1

References

Verify integrity in audit chain (admin only). AS-IS.