CVE-2020-35730An 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.
Updated under an hour ago ()
Does this affect you?
It affects roundcube webmail and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jun 22, 2023; federal agencies had to remediate by Jul 13, 2023. Treat that date as your deadline.
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Free account, 1 product
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.
- CVSS
- 6.1 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Added to CISA KEV Jun 22, 2023; federal remediation due Jul 13, 2023Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 32.92% (percentile 98)
- Assigned by
- mitre
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
roundcube webmail roundcube:webmail | before 1.2.13; from 1.3.0 before 1.3.16; from 1.4 before 1.4.10 | NVD |
fedoraproject fedora fedoraproject:fedora | 32; 33 | NVD |
debian debian_linux debian:debian_linux | 9.0 | NVD |
References
- https://roundcube.net/download/x-refsource-misc, product
- https://github.com/roundcube/roundcubemail/compare/1.4.9...1.4.10x-refsource-confirm, patch
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=978491x-refsource-confirm, issue-tracking, mailing-list
- https://www.alexbirnberg.com/roundcube-xss.htmlx-refsource-misc, broken-link
- https://github.com/roundcube/roundcubemail/releases/tag/1.4.10x-refsource-confirm, release-notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.3.16x-refsource-confirm, release-notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.2.13x-refsource-confirm, release-notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HMLIZWKMTRCLU7KZLEQHELS4INXJ7X5Q/vendor-advisory, x-refsource-fedora, mailing-list, release-notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HCEU4BM5WGIDJWP6Z4PCH62ZMH57QYM2/vendor-advisory, x-refsource-fedora, mailing-list, release-notes
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-35730us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.