CVEvulnerability

CVE-2023-43770

6.1 MEDIUM Known exploited Published 2023-09-22 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability — Roundcube Webmail

Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that can lead to information disclosure via malicious link references in plain/text messages.

Added to KEV: 2024-02-12
Remediation due: 2024-03-04
Ransomware 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

Status: Analyzed
Published: 2023-09-22
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 6.1 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 6.1 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weaknesses: CWE-79

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.

Affected configurations

• roundcube webmail (< 1.4.14) • roundcube webmail (>= 1.5.0 < 1.5.4) • roundcube webmail (>= 1.6.0 < 1.6.3) • debian debian linux 10.0

Weakness · CWE (1)

CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References