CVE-2020-35730

roundcube webmail, fedoraproject fedora, debian linux

Published 28 Dec 2020 · updated 17 Jun 2026 · Analyzed

6.1 Medium · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 22 Jun 2023, with a remediation deadline of 13 Jul 2023 for US federal agencies.

Required action: Apply updates per vendor instructions.

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.

References

bugs.debian.org/cgi-bin/bugreport.cgi?bug=978491 · Issue Tracking, Mailing List
github.com/roundcube/roundcubemail/compare/1.4.9...1.4.10 · Patch
github.com/roundcube/roundcubemail/releases/tag/1.2.13 · Release Notes
github.com/roundcube/roundcubemail/releases/tag/1.3.16 · Release Notes
github.com/roundcube/roundcubemail/releases/tag/1.4.10 · Release Notes
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HCEU4BM5WGIDJWP6Z4PCH62ZMH57QYM2/ · Mailing List, Release Notes
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HMLIZWKMTRCLU7KZLEQHELS4INXJ7X5Q/ · Mailing List, Release Notes
roundcube.net/download/ · Product
www.alexbirnberg.com/roundcube-xss.html · Broken Link
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-35730 · US Government Resource