Medium severity · published Dec 28, 2020
CVE-2020-35730
Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability
In wildKEV
6.1
CVSS
32.9%
EPSS
Yes
On KEV
Description
An XSS issue was discovered in Roundcube Webmail before 1.2.13, 1.3.x before 1.3.16, and 1.4.x before 1.4.10. The attacker can send a plain text e-mail message, with JavaScript in a link reference element that is mishandled by linkref_addindex in rcube_string_replacer.php.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)32.9% · higher than 98% of CVEs
Exploited in the wildYes
CISA KEVListed Jun 22, 2023
Federal remediation dueJul 13, 2023
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0 · source: NVD
FE
Fedora · Fedoraproject
32; 33 · source: NVD
WE
Webmail · Roundcube
before 1.2.13; 1.3.0 before 1.3.16; 1.4 before 1.4.10 · source: NVD
RW
Roundcube Webmail · Roundcube
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35730
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-35730
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://roundcube.net/download/
x_refsource_CONFIRM
https://github.com/roundcube/roundcubemail/compare/1.4.9...1.4.10
x_refsource_CONFIRM
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=978491
x_refsource_MISC
https://www.alexbirnberg.com/roundcube-xss.html
x_refsource_CONFIRM
https://github.com/roundcube/roundcubemail/releases/tag/1.4.10
x_refsource_CONFIRM
https://github.com/roundcube/roundcubemail/releases/tag/1.3.16
More from Debian Linux
10.0
CVE-2025-32433
Erlang/OTP SSH Vulnerable to Pre-Authentication RCE
10.0
CVE-2025-24201
Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability
10.0
CVE-2021-44228
Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
10.0
CVE-2015-3306
ProFTPD Improper Access Control Vulnerability
9.8
CVE-2026-24061
GNU InetUtils Argument Injection Vulnerability