Roundcube Roundcube Webmail
YES - ON THE CISA KEV LIST
CVE-2020-35730
Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability
overdue since 2023-07-13
Roundcube: 11 entries (0.6% of all KEV entries are from this vendor); 2 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
Description
Roundcube Webmail contains a cross-site scripting (XSS) vulnerability that allows an attacker to send a plain text e-mail message with Javascript in a link reference element that is mishandled by linkref_addinindex in rcube_string_replacer.php.
Required action (CISA)
Apply updates per vendor instructions.
Notes
https://roundcube.net/news/2020/12/27/security-updates-1.4.10-1.3.16-and-1.2.13; https://nvd.nist.gov/vuln/detail/CVE-2020-35730
References
Other KEV entries for this vendor: Roundcube
- CVE-2025-49113 - Webmail (2026-02-20)
- CVE-2025-68461 - Webmail (2026-02-20)
- CVE-2024-42009 - Webmail (2025-06-09)
- CVE-2024-37383 - Webmail (2024-10-24)
- CVE-2020-13965 - Webmail (2024-06-26)
- CVE-2023-43770 - Webmail (2024-02-12)
- CVE-2023-5631 - Webmail (2023-10-26)
- CVE-2020-12641 - Roundcube Webmail (2023-06-22)
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