CVE-2023-43770
Published 2023-09-22 · Updated 2026-06-17 · Source cve@mitre.org
Summary
CVE-2023-43770 is a medium-severity (CVSS 6.1) vulnerability in Roundcube Webmail. CISA added it to the Known Exploited Vulnerabilities catalog on February 12, 2024, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by March 4, 2024. CISA does not currently list it as used in ransomware campaigns. Roundcube has 11 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.
All 11 known-exploited Roundcube vulnerabilities →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.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CISA Known-Exploited Vulnerability
Product: Roundcube — Webmail
Name: Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability
Date added: 2024-02-12 · Due: 2024-03-04
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
References
- https://github.com/roundcube/roundcubemail/commit/e92ec206a886461245e1672d8530cc93c618a49b
- https://lists.debian.org/debian-lts-announce/2023/09/msg00024.html
- https://roundcube.net/news/2023/09/15/security-update-1.6.3-released
- https://github.com/roundcube/roundcubemail/commit/e92ec206a886461245e1672d8530cc93c618a49b
- https://lists.debian.org/debian-lts-announce/2023/09/msg00024.html
- https://roundcube.net/news/2023/09/15/security-update-1.6.3-released
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43770