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PatchSiren cyber security CVE debrief

CVE-2020-13965 Roundcube CVE debrief

CVE-2020-13965 is a cross-site scripting (XSS) issue affecting Roundcube Webmail. CISA added it to the Known Exploited Vulnerabilities catalog on 2024-06-26, which makes it a high-priority remediation item for anyone running Roundcube Webmail. Defenders should confirm whether any Roundcube instances are in use, apply the vendor's security guidance referenced by CISA, and if mitigations cannot be applied safely, discontinue use until the issue is remediated.

Vendor
Roundcube
Product
Webmail
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2024-06-26
Original CVE updated
2024-06-26
Advisory published
2024-06-26
Advisory updated
2024-06-26

Who should care

Administrators, security teams, and service owners responsible for Roundcube Webmail deployments, especially internet-facing webmail portals and hosted email environments.

Technical summary

The official records supplied here identify CVE-2020-13965 as a cross-site scripting vulnerability in Roundcube Webmail. The corpus does not include exploit steps, a validated version-range summary, or a CVSS score, but it does show that CISA considers the issue known exploited and links to the vendor's security update advisory and official CVE/NVD records.

Defensive priority

Immediate

Recommended defensive actions

  • Inventory all Roundcube Webmail deployments and confirm whether any instances are exposed to users or the internet.
  • Apply the vendor mitigations and security updates referenced by CISA in the Roundcube advisory.
  • If mitigations are unavailable or cannot be deployed safely, discontinue use of the affected Roundcube Webmail instance until it is remediated.
  • Review the official Roundcube advisory and the linked CVE/NVD records to confirm the applicable fixed release path for your deployment.

Evidence notes

This debrief is based only on the supplied CISA KEV source item and the official CVE/NVD/vendor links it references. The source item states that CVE-2020-13965 was added to CISA KEV on 2024-06-26 with a due date of 2024-07-17, and its notes point to Roundcube's security update advisory plus the NVD record. No exploit narrative, version-specific impact matrix, or CVSS score was provided in the corpus.

Official resources

CISA listed CVE-2020-13965 in the Known Exploited Vulnerabilities catalog on 2024-06-26. The supplied CISA metadata points defenders to Roundcube's vendor security update advisory and the official CVE/NVD records.