CVE-2023-43770
Cross-site Scripting — is CVE-2023-43770real, exploitable, or a false positive? Here's the community ground truth.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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
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Community ground truth
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Practitioners rate this higher than its CVSS — treat with extra caution.
Field notes & remediation
Verdicts are the quick signal — notes are the evidence and fixes behind them.
- 0
Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability — Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that can lead to information disclosure via malicious link references in plain/text messages. Listed in the CISA KEV catalog (added 2024-02-12) — confirmed exploited in the wild, not theoretical. FIRST EPSS puts the chance of exploitation in the next 30 days at ~57%. Treat it as real and prioritize remediation over triage.
- 0
Required action for Roundcube Webmail: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. CISA set a federal remediation due date of 2024-03-04. After patching, verify the vulnerable path is no longer reachable before closing the finding.
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Same weakness — CWE-79 · Cross-site Scripting.
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