CVE Watch—

CVE-2023-5631

Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability

CVSS

—

No CVSS

EPSS

75.9%

p100

KEV

YES

Oct 26, 2023

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

75.9%EPSS · 30 days75.9%

2026-09-162026-10-14

KEV catalog record

Product

Roundcube / Webmail

Vulnerability

Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability

Added to KEV

Oct 26, 2023

Remediate by

Nov 16, 2023

Known ransomware use

Summary description

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

Required action

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

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

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