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

- Exploited (CISA KEV): yes, added 2023-10-26
- Published: 2023-10-18
- CVSS: 6.1 MEDIUM (v3.1)
- EPSS: 76.3% (100th percentile)
- CWE: CWE-79

Roundcube before 1.4.15, 1.5.x before 1.5.5, and 1.6.x before 1.6.4 allows stored XSS via an HTML e-mail message with a crafted SVG document because of program/lib/Roundcube/rcube_washtml.php behavior. This could allow a remote attacker

to load arbitrary JavaScript code.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | Before feed history | — | — |
| Fastly | Before feed history | — | — |
| F5 | No public claim | — | — |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2023-5631 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2023-5631