Description
An issue was discovered in Roundcube Webmail before 1.3.12 and 1.4.x before 1.4.5. There is XSS via a malicious XML attachment because text/xml is among the allowed types for a preview.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | roundcube | 1.4.5+dfsg.1-1 | — |
| Debian 13 | roundcube | 1.4.5+dfsg.1-1 | — |
| Debian 12 | roundcube | 1.4.5+dfsg.1-1 | — |
| Debian 10 | roundcube | 1.3.13+dfsg.1-1~deb10u1 | DSA-4700-1 |
| Debian 9 | roundcube | 1.2.3+dfsg.1-4+deb9u5 | DSA-4700-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | roundcube | 1.5.0+dfsg.1-2ubuntu0.1~esm1 | USN-5182-1 |
| Ubuntu Pro 20.04 LTS | roundcube | 1.4.3+dfsg.1-1ubuntu0.1~esm1 | USN-5182-1 |
| Ubuntu Pro 18.04 LTS | roundcube | 1.3.6+dfsg.1-1ubuntu0.1~esm2 | USN-5182-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | roundcube | 1.2~beta+dfsg.1-0ubuntu1+esm2 | USN-5182-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
mbadanoiu/CVE-2020-13965 ★ 0 · Apr 13, 2024
CVE-2020-13965: Cross-Site Scripting via Malicious XML Attachment in Roundcube Webmail
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 2
- USN-5182-1 roundcube vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-4700-1 roundcube - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://github.com/roundcube/roundcubemail/releases/tag/1.4.5
- https://github.com/roundcube/roundcubemail/releases/tag/1.3.12
- https://github.com/roundcube/roundcubemail/commit/884eb611627ef2bd5a2e20e02009ebb1eceecdc3
- https://github.com/roundcube/roundcubemail/compare/1.4.4...1.4.5
- https://roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12
- DSA-4700 vendor-advisory
- FEDORA-2020-2a1a6a8432 vendor-advisory
- FEDORA-2020-aeffd92b77 vendor-advisory
- https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-13965-Cross%20Site-Scripting%20via%20Malicious%20XML%20Attachment-Roundcube