HOMEVULNERABILITIESCVE-2020-13965
HIGHCISA KEVIN THE WILD

CVE-2020-13965

Published: June 26, 2024

EPSS:82.69%probability of exploitation in 30 daysPercentile:99.2th

Official Description

Roundcube Webmail contains a cross-site scripting (XSS) vulnerability that allows a remote attacker to manipulate data via a malicious XML attachment.

NVD Source

CISA KEV Advisory

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.

Added to KEV: 2024-06-26Federal patch deadline: 2024-07-17
Required Action (CISA)

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

Risk Analysis

Roundcube Webmail is affected by a cross-site scripting (XSS) vulnerability, allowing a remote attacker to manipulate data through a malicious XML attachment. The high EPSS score of 0.82687 indicates a significant likelihood of exploitation. This vulnerability is confirmed to be actively exploited, as it is in CISA's KEV.

This vulnerability has been actively exploited in the wild. It is remotely exploitable, typically through a user opening or interacting with a malicious XML attachment.

Recommended Action

Update Roundcube Webmail to the latest secure version. Implement content security policies and educate users about the risks of opening suspicious attachments.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2020-13965 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2020-13965 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.

Exploit & PoC Resources

ACTIVE EXPLOITATIONConfirmed exploitation in the wild
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All References (2)

Quick Facts

CVE IDCVE-2020-13965
SeverityHIGH
CISA KEVYES — Active Exploitation
ExploitIN THE WILD
EPSS (30d)82.69%
PublishedJun 26, 2024

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2020-13965 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
  • !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
  • !Active exploitation confirmed — treat as P1
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.