Vulnerability Intelligence Report
Stored XSS vulnerability in Roundcube
CVE-2023-5631
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.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
6.1
MEDIUM
Exploitability:2.9
Impact Score:2.8
EPSS Probability:70.88%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-79 ↗CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Roundcube | Roundcubemail | 1.6.0 < 1.6.3 (affected), 1.5.0 < 1.5.4 (affected), 1.4.0 < 1.5.14 (affected), 1.6.4 (unaffected), 1.5.5 (unaffected), 1.5.15 (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | ESET, spol. s r.o. · Vendor · Slovak Republic |
| Reserved | 2023-10-18T06:50:57 |
| Published | 2023-10-18T14:51:18 |
| Last Updated | 2025-10-21T23:05:34 |
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