CVE-2020-13965
Published: June 26, 2024
Official Description
Roundcube Webmail contains a cross-site scripting (XSS) vulnerability that allows a remote attacker to manipulate data via a malicious XML attachment.
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.
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.
Update Roundcube Webmail to the latest secure version. Implement content security policies and educate users about the risks of opening suspicious attachments.
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
All References (2)
Quick Facts
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