Intelligence online17 sources monitored8 actively exploited 7d26 published 24hChecked recently
Vulnerability record

CVE-2020-35730

Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability

ElevatedExploitation confirmedCISA KEV
What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Roundcube Webmail, fix it now.

CISA required action: Apply updates per vendor instructions.

US federal civilian agencies must remediate by Jul 13, 2023.

Patch status

Official fix available since

Apply the vendor's update to every affected system. Check the fixed-in versions below where known.

Basis: NVD patch reference

Description

An XSS issue was discovered in Roundcube Webmail before 1.2.13, 1.3.x before 1.3.16, and 1.4.x before 1.4.10. The attacker can send a plain text e-mail message, with JavaScript in a link reference element that is mishandled by linkref_addindex in rcube_string_replacer.php.

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

ProductVendorAffected versionsFixed inSource
Roundcube WebmailRoundcube——KEV
WebmailRoundcube< 1.2.13; >= 1.3.0, < 1.3.16; >= 1.4, < 1.4.101.2.13; 1.3.16; 1.4.10NVD

Sources: KEV = CISA Known Exploited Vulnerabilities catalog; NVD = NIST National Vulnerability Database.

Intelligence timeline

Developments from the last 30 days, newest first.

  1. CVSS scoredUpdateKEV

    CVE-2020-35730 scored CVSS 6.1: Roundcube Roundcube Webmail, Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability

    CISA lists this as exploited in the wild. Unpatched Roundcube Webmail systems are exposed to active attacks now.

    Basis: NIST National Vulnerability Database

  2. Patch releasedUpdateKEV

    Patch released for CVE-2020-35730: Roundcube Roundcube Webmail, Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability

    An official fix is now available for Roundcube Roundcube Webmail. This vulnerability is being exploited, so apply it promptly.

    Basis: NVD patch reference

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

  • roundcube.net https://roundcube.net/news/2020/12/27/security-updates-1.4.10-1.3.16-and-1.2.13
  • nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2020-35730
  • bugs.debian.org https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=978491
  • github.com https://github.com/roundcube/roundcubemail/compare/1.4.9...1.4.10
  • github.com https://github.com/roundcube/roundcubemail/releases/tag/1.2.13
  • github.com https://github.com/roundcube/roundcubemail/releases/tag/1.3.16
  • github.com https://github.com/roundcube/roundcubemail/releases/tag/1.4.10
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HCEU4BM5WGIDJ…
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HMLIZWKMTRCLU…
  • roundcube.net https://roundcube.net/download/
  • alexbirnberg.com https://www.alexbirnberg.com/roundcube-xss.html
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-35730