CVE-2020-35730
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.
Actively exploited
- In the CISA exploited-vulnerabilities catalogue since Jun 22, 2023
- US federal agencies must remediate it by Jul 13, 2023 (BOD 22-01)
- First attack observed 903 days after disclosure
Apply updates per vendor instructions.
Source: CISA KEV · Oct 9, 2025 May 23, 2025 May 23, 2025 May 22, 2025 May 21, 2025 May 15, 2025
CVSS score6.1 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NWeakness type (CWE)CWE-79, CWE-79
Vendorsdebian, fedoraproject, roundcube
Affected products
| Vendors | Product | Versions |
|---|---|---|
| roundcube | webmail | < 1.2.13 |
| fedoraproject | fedora | 32 |
| debian | debian linux | 9.0 |
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This product uses the NVD API but is not endorsed or certified by the NVD.