CVE-2023-43770

6.1 MEDIUM CISA KEV - Actively Exploited

Published: September 22, 2023 Modified: October 31, 2025

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://github.com/roundcube/roundcubemail/commit/e92ec206a886461245e1672d8530cc93c618a49b

Source: cve@mitre.org

Patch

https://lists.debian.org/debian-lts-announce/2023/09/msg00024.html

Source: cve@mitre.org

Mailing List

https://roundcube.net/news/2023/09/15/security-update-1.6.3-released

Source: cve@mitre.org

Release Notes

https://github.com/roundcube/roundcubemail/commit/e92ec206a886461245e1672d8530cc93c618a49b

Source: af854a3a-2127-422b-91ae-364da2661108

Patch

https://lists.debian.org/debian-lts-announce/2023/09/msg00024.html

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing List

https://roundcube.net/news/2023/09/15/security-update-1.6.3-released

Source: af854a3a-2127-422b-91ae-364da2661108

Release Notes

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43770

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

7 reference(s) from NVD

Quick Stats

CVSS v3 Score

6.1 / 10.0

EPSS (Exploit Probability)

73.1%

99th percentile

Exploitation Status

Actively Exploited

Remediation due: 2024-03-04

Weaknesses (CWE)

CWE-79 CWE-79

Affected Vendors

debian roundcube

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