CVE-2023-5631—Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability

Vulnerability Name

Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability

Description

Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that allows a remote attacker to run malicious JavaScript code.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:

Unknown

Action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Additional Notes

• https://roundcube.net/news/2023/10/16/security-update-1.6.4-released, https://roundcube.net/news/2023/10/16/security-updates-1.5.5-and-1.4.15
• https://nvd.nist.gov/vuln/detail/CVE-2023-5631

Related News Articles

• CISA: Recently patched RoundCube flaws now exploited in attacksFebruary 23, 2026
• Hackers exploit Roundcube webmail flaw to steal email, credentialsOctober 21, 2024
• Roundcube flaws allow easy email account compromise (CVE-2024-42009, CVE-2024-42008)August 7, 2024

Related Weaknesses

• CWE-79