CVE-2023-43770

CVE Enrichment

CVSS: 6.1 MEDIUM
EPSS: 63.66%
EPSS Percentile: 99.20%
CISA KEV: YES — Known Exploited Vulnerability

Description

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: cve@mitre.org
Published: 22-Sep-2023 13:15
Last Modified: 17-Jun-2026 13:26
EPSS Date: 2026-10-10
CWE: CWE-79

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:R /
                            S:C /
                            C:L /
                            I:L /
                            A:N

CISA KEV Details

Date Added: 2024-02-12
Remediation Due: 2024-03-04
Known Ransomware Campaign Use: Unknown
Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes: https://roundcube.net/news/2023/09/15/security-update-1.6.3-released ; https://nvd.nist.gov/vuln/detail/CVE-2023-43770

Affected Products / Versions

roundcube / webmail
Version / affected range: * · before (exclusive) 1.4.14
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
roundcube / webmail
Version / affected range: * · from (inclusive) 1.5.0 · before (exclusive) 1.5.4
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
roundcube / webmail
Version / affected range: * · from (inclusive) 1.6.0 · before (exclusive) 1.6.3
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
debian / debian_linux
Version / affected range: 10.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

References

Last enrichment sync: 11-Oct-2026 13:09
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

CVE-2023-43770: Roundcube (n-day) TA458 Uses Half-Click Webmail Exploits to Steal Email and Establish Persistent Access

CVE (6)

Malware (1)

Threat Actors (3)

MITRE ATT&CK (5)

Vendors (1)

Products (5)

Tools (1)

Industries (5)

Countries (5)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.