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CVE-2020-13965

Cross-site Scripting — is CVE-2020-13965real, exploitable, or a false positive? Here's the community ground truth.

Medium · CVSS 6.1EPSS 76.6%CISA KEVCWE-79 · Cross-site Scripting

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

An issue was discovered in Roundcube Webmail before 1.3.12 and 1.4.x before 1.4.5. There is XSS via a malicious XML attachment because text/xml is among the allowed types for a preview.

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Community ground truth

Community verdict

3 verdicts
Not a real issue

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Community real-world severity: High (High 3) — CVSS base score 6.1

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
    Field note · Aisha RahmanCurated

    Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability — Roundcube Webmail contains a cross-site scripting (XSS) vulnerability that allows a remote attacker to manipulate data via a malicious XML attachment. Listed in the CISA KEV catalog (added 2024-06-26) — confirmed exploited in the wild, not theoretical. FIRST EPSS puts the chance of exploitation in the next 30 days at ~77%. Treat it as real and prioritize remediation over triage.

  • 0
    Remediation · Tomáš NovákCurated

    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 2024-07-17. After patching, verify the vulnerable path is no longer reachable before closing the finding.

Same weaknessCWE-79 · Cross-site Scripting.