CVE-2023-43770

roundcube webmail, debian_linux

Published 22 Sept 2023 · updated 17 Jun 2026 · Analyzed

6.1 Medium · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 12 Feb 2024, with a remediation deadline of 4 Mar 2024 for US federal agencies.

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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.

References

github.com/roundcube/roundcubemail/commit/e92ec206a886461245e1672d8530cc93c618a49b · Patch
lists.debian.org/debian-lts-announce/2023/09/msg00024.html · Mailing List
roundcube.net/news/2023/09/15/security-update-1.6.3-released · Release Notes
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43770 · US Government Resource