CVEs / CVE-2020-35730
CVE-2020-35730: Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability
- Known exploited in the CISA KEV catalog since 22 Jun 2023
- medium 6.1 CVSS 3.1 (NVD)
- EPSS 32.9% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Roundcube Webmail contains a cross-site scripting (XSS) vulnerability that allows an attacker to send a plain text e-mail message with Javascript in a link reference element that is mishandled by linkref_addinindex in rcube_string_replacer.php.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a n/a | n/a | — |
Exploitation
| In CISA KEV since | 22 Jun 2023 |
|---|---|
| Due date for US federal agencies | 13 Jul 2023 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 6.1 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NScored by NVD |
|---|---|
| Weakness | CWE-79 |
References
- CVE-2020-35730 on NVD
- CVE-2020-35730 in the CISA KEV catalog
- https://roundcube.net/news/2020/12/27/security-updates-1.4.10-1.3.16-and-1.2.13 (cited by CISA)
- CVE-2020-35730 on OSV
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=978491 Issue Tracking, Mailing List
- https://github.com/roundcube/roundcubemail/compare/1.4.9...1.4.10 Patch
- https://github.com/roundcube/roundcubemail/releases/tag/1.2.13 Release Notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.3.16 Release Notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.4.10 Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HCEU4BM5WGIDJWP6Z4PCH62ZMH57QYM2/ Mailing List, Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HMLIZWKMTRCLU7KZLEQHELS4INXJ7X5Q/ Mailing List, Release Notes
- https://roundcube.net/download/ Product
- https://www.alexbirnberg.com/roundcube-xss.html Broken Link
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-35730 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.