CVE-2020-35730

Published: Dec 28, 2020Updated: Nov 4, 2025 Sources: CVE List NVD BDUCWE-79

6.1MEDIUM

NVD MITRE

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:RUser Interaction

Required

Scope

S:CScope

Changed

Impact

C:LConfidentiality

Low

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-79

Affected Products

Thomas Brderli

oss-project·DEaka roundcube, roundcube webmail

webmailWeb App

Communications / email-server-client

RoundcubeOn-prem

Communications / email-server-client

fedoraproject

oss-project·USaka fedora project

fedoraOn-premOS

Operating Systems / linux-distro

debian

oss-project·GBaka debian gnu/linux

debian linuxOn-premOS

Operating Systems / linux-distro

Сообщество свободного программного обеспечения

oss-projectaka fsf

Debian GNU/LinuxOn-premOS

Operating Systems / linux-distro

Fedora Project

oss-project·USaka fedora

FedoraOn-premOS

Operating Systems / linux-distro

and 1 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability

Added to KEV:Jun 22, 2023

Remediation due:Jul 13, 2023

Required action: Apply updates per vendor instructions.

Official Patch Available

Is your org exposed to CVE-2020-35730?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Execution

Initial Access

View detailed technique mapping

References

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=978491

bugs.debian.org

https://github.com/roundcube/roundcubemail/compare/1.4.9...1.4.10

github.com

https://github.com/roundcube/roundcubemail/releases/tag/1.2.13

github.com

and 15 more references View all →

News mentions

Hackers now exploit critical Roundcube flaw in code injection attacks
en-us·BleepingComputer·Sep 24, 2026 Exploited Roundcube Webmail Winter Vivern

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