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Vulnerability Intelligence Report
Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability

CVE-2023-43770

Roundcube before 1.4.14, 1.5.x before 1.5.4, and 1.6.x before 1.6.3 allows XSS via text/plain e-mail messages with crafted links because of program/lib/Roundcube/rcube_string_replacer.php behavior.

CISA KEV SSVC: Active Exploitation
CVSS Base Score
6.1
MEDIUM
Exploitability:2.9
Impact Score:2.8
EPSS Probability:56.89%
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 webmail all
debian debian_linux 10.0

References & Technical Advisories

No reference links found.

Threat Intelligence Signals

CISA KEV
ACTIVE IN CATALOG
EPSS Score
56.895%

Identity & Timeline

StatusPUBLISHED
Assigning AuthorityMITRE Corporation · N/A · USA
Reserved2023-09-22T00:00:00
Published2023-09-22T00:00:00
Last Updated2025-10-21T23:05:36

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