CVE-2020-35730

CISA 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

Apply updates per vendor instructions.

Notes & references

• 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

Where this lands in 800-53

Vulnerability data triggers these controls during assessment and continuous monitoring.

• RA-5 · Vulnerability Monitoring and Scanning
• SI-2 · Flaw Remediation
• CM-6 · Configuration Settings
• SI-7 · Software, Firmware, and Information Integrity
• CM-8 · System Component Inventory

External lookups

• NVD · CVE-2020-35730
• CVE.org · CVE-2020-35730
• CISA KEV catalog (canonical)