ACTIVELY EXPLOITED
CVE-2020-35730: Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability
| Vendor | Roundcube |
|---|---|
| Product | Roundcube Webmail |
| Actively exploited | Yes |
| Added to CISA KEV | 22 Jun 2023 |
| CISA federal deadline | 13 Jul 2023 |
| Weakness (CWE) | CWE-79 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
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.
SOURCES
Other Roundcube flaws
- CVE-2025-68461: RoundCube Webmail Cross-site Scripting Vulnerability
- CVE-2025-49113: RoundCube Webmail Deserialization of Untrusted Data Vulnerability
- CVE-2024-42009: RoundCube Webmail Cross-Site Scripting Vulnerability
- CVE-2024-37383: RoundCube Webmail Cross-Site Scripting (XSS) Vulnerability
- CVE-2020-13965: Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.