📦

webmail

Vendor: roundcube

Actively Exploited 11 CISA KEV List
PoC / Exploits 15 Code Available
Total RCEs 7 Remote Access
Total CVEs 551 Total Indexed
Avg. EPSS 11.66% Exploit Prob.
Latest CVE CVE-2026-54433 Jul 14

Security Vulnerability Index

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7.4 CVSS

Roundcube Webmail through 1.3.9 mishandles Punycode xn-- domain names, leading to homograph attacks.

EPSS: 0.93%
4.3 CVSS

In Roundcube Webmail before 1.3.10, an attacker in possession of S/MIME or PGP encrypted emails can wrap them as sub-parts within a crafted multipart email. The encrypted part(s) can further be hidden using HTML/CSS or ASCII newline characters. This modified multipart email can be re-sent by the attacker to the intended receiver. If the receiver replies to this (benign looking) email, they unknowingly leak the plaintext of the encrypted message part(s) back to the attacker.

EPSS: 0.77%
6.1 CVSS

steps/mail/func.inc in Roundcube before 1.3.8 has XSS via crafted use of <svg><style>, as demonstrated by an onload attribute in a BODY element, within an HTML attachment.

EPSS: 60.16%
7.5 CVSS

Roundcube before 1.3.7 mishandles GnuPG MDC integrity-protection warnings, which makes it easier for attackers to obtain sensitive information, a related issue to CVE-2017-17688. This is associated with plugins/enigma/lib/enigma_driver_gnupg.php.

EPSS: 1.60%
5.9 CVSS

The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL. NOTE: third parties report that this is a problem in applications that mishandle the Modification Detection Code (MDC) feature or accept an obsolete packet type, not a problem in the OpenPGP specification

EPSS: 5.50%
8.8 CVSS

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.

EPSS: 2.29%
7.5 CVSS

roundcube version 1.3.4 and earlier contains an Insecure Permissions vulnerability in enigma plugin that can result in exfiltration of gpg private key. This attack appear to be exploitable via network connectivity.

EPSS: 1.68%
7.8 CVSS
CVE-2017-16651
Exploit Found

Roundcube Webmail before 1.1.10, 1.2.x before 1.2.7, and 1.3.x before 1.3.3 allows unauthorized access to arbitrary files on the host's filesystem, including configuration files, as exploited in the wild in November 2017. The attacker must be able to authenticate at the target system with a valid username/password as the attack requires an active session. The issue is related to file-based attachment plugins and _task=settings&_action=upload-display&_from=timezone requests.

EPSS: 36.92%
7.5 CVSS
CVE-2015-5383
Exploit Found

Roundcube Webmail 1.1.x before 1.1.2 allows remote attackers to obtain sensitive information by reading files in the (1) config, (2) temp, or (3) logs directory.

EPSS: 3.77%
6.5 CVSS

program/steps/addressbook/photo.inc in Roundcube Webmail before 1.0.6 and 1.1.x before 1.1.2 allows remote authenticated users to read arbitrary files via the _alt parameter when uploading a vCard.

EPSS: 3.31%