Servers and applications
CVE-2019-10740
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…
- Severity
- Medium 4.3
- Published
- 7 Apr 2019
- Last changed
- 17 Jun 2026
- Added to UpHeron
- 1 Nov 2026
- Fixed in
- 1.3.10
- Exploit chance
- 0.8% in the next 30 daysHigher than 55% of CVEs. EPSS by FIRST, 10 Nov 2026
- Weakness
- Cleartext transmission (CWE-319)
- Attack
- Over the network · No login needed · Needs someone to click or open something
- Attacker can
- Change some data
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N- Sources
- NVD
Description
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.
Affected software
| Software | Affected versions |
|---|---|
RoundcubeServers and applications · cpe:a:roundcube:webmail |
|