ClosedPatched

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

Roundcube Webmail

Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that allows a remote attacker to run malicious JavaScript code. Added to CISA KEV on 2023-10-26.

Why this severity: CVSS 5.4 (NVD), actively exploited (CISA KEV)

Started: Oct 26, 2023
Closed: Oct 26, 2023
CVE: CVE-2023-5631

Follow this incident

Updated Oct 26, 2023

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

Oct 26, 2023
CISA added CVE-2023-5631 to the KEV catalog (due 2023-11-16).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).

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