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CVE-2023-43770: Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability

criticalknown exploitedpublic exploitCVE-2023-43770
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that can lead to information disclosure via malicious link references in plain/text messages.

CSIRTS triage

vendor: RoundcubeCross-site scripting
What
A persistent cross-site scripting (XSS) vulnerability can lead to information disclosure via malicious link references.
Who is affected
Users of Roundcube Webmail are affected.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Update to the latest version of Roundcube to fix the vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2024-02-12
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-43770

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2023-43770coverage & exploitation statusNVD · CVE.org

Recent advisories for Roundcube Webmail Persistent

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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