CVE-2020-13965
An issue was discovered in Roundcube Webmail before 1.3.12 and 1.4.x before 1.4.5. There is XSS...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
6.1
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.
- Record
CVE-2020-13965- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79, CWE-80
- Updated
- 2026-11-02
CVE List
6.3
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.
- Record
CVE-2020-13965- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-80
- Updated
- 2026-11-02
EUVDEUVD-2020-6139
6.3
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.
- Record
EUVD-2020-6139- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-44qp-5pm8-6j8p
6.1
An issue was discovered in Roundcube Webmail before 1.3.12 and 1.4.x before 1.4.5. There is XSS...
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.
- Record
GHSA-44qp-5pm8-6j8p- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79, CWE-80
- Updated
- 2026-11-02
CISA KEV No score
Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability
Roundcube Webmail contains a cross-site scripting (XSS) vulnerability that allows a remote attacker to manipulate data via a malicious XML attachment.
- Record
CVE-2020-13965- Weakness
- CWE-80
- Updated
- 2026-11-02
OSV
6.1
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.
- Record
CVE-2020-13965- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
Show 5 moreShow less
OSVDEBIAN-CVE-2020-13965
6.1
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.
- Record
DEBIAN-CVE-2020-13965- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-13965
6.3
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.
- Record
UBUNTU-CVE-2020-13965- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVBIT-roundcube-2020-13965 No score
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.
- Record
BIT-roundcube-2020-13965- Updated
- 2026-11-02
OSVMGASA-2020-0261 No score
Updated roundcubemail packages fix security vulnerability
The latest maintenance release of roundcubemail fixes some xss issues:
- Fix XSS issue in template object 'username'
- Fix cross-site scripting (XSS) via malicious XML attachment and improves the fix for CVE-2020-12641
- Record
MGASA-2020-0261- Updated
- 2026-11-02
OSVUSN-5182-1 No score
roundcube vulnerabilities
It was discovered that Roundcube Webmail allowed JavaScript code to be present in the CDATA of an HTML message. A remote attacker could possibly use this issue to execute a cross-site scripting (XSS) attack. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-12625)
It was discovered that Roundcube Webmail incorrectly processed login and logout POST requests. An attacker could possibly use this issue to launch a cross-site request forgery (CSRF) attack and force an authenticated user to be logged out. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-12626)
It was discovered that Roundcube Webmail incorrectly processed new plugin names in rcube_plugin_api.php. An attacker could possibly use this issue to obtain sensitive information from local files or to execute arbitrary code. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-12640)
It was discovered that Roundcube Webmail did not sanitize shell metacharacters recovered from variables in its configuration settings. An attacker could possibly use this issue to execute arbitrary code in the server. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-12641)
It was discovered that Roundcube Webmail incorrectly sanitized characters in the username template object. An attacker could possibly use this issue to execute a cross-site scripting (XSS) attack. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-13964)
It was discovered that Roundcube Webmail allowed preview of text/html content. A remote attacker could possibly use this issue to send a malicious XML attachment via an email message and execute a cross-site scripting (XSS) attack. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-13965)
Andrea Cardaci discovered that Roundcube Webmail did not properly sanitize HTML special characters when dealing with HTML messages that contained an SVG element in the XML namespace. A remote attacker could possibly use this issue to execute a cross-site scripting (XSS) attack. This issue only affected Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-15562)
Lukasz Pilorz discovered that Roundcube Webmail did not properly sanitize HTML special characters when dealing with HTML messages that contained SVG documents. A remote attacker could possibly use this issue to execute a cross-site scripting (XSS) attack. This issue only affected Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-16145)
Alex Birnberg discovered that Roundcube Webmail incorrectly sanitized characters in plain text e-mail messages that included link reference elements. A remote attacker could possibly use this issue to execute a cross-site scripting (XSS) attack. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-35730)
It was discovered that Roundcube Webmail did not properly sanitize HTML special characters in warning messages that contained an attachment's filename extension. A remote attacker could possibly use this issue to execute a cross-site scripting (XSS) attack. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2021-44025)
It was discovered that Roundcube Webmail incorrectly managed session variables related to search functionalities. A remote attacker could possibly use this issue to execute a SQL injection attack. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2021-44026)
It was discovered that Roundcube Webmail did not properly sanitize HTML special characters when dealing with HTML messages that contained CSS content. A remote attacker could possibly use this issue to execute a cross-site scripting (XSS) attack. This issue only affected Ubuntu 18.04 ESM, Ubuntu 20.04 ESM and Ubuntu 22.04 ESM. (CVE-2021-46144)
- Record
USN-5182-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
roundcubeBitnami |
before 1.3.12, 1.4.0 up to 1.4.5 | 1.3.121.4.5 |
roundcubeDebian:12 |
before 1.4.5+dfsg.1-1 | 1.4.5+dfsg.1-1 |
roundcubeDebian:13 |
before 1.4.5+dfsg.1-1 | 1.4.5+dfsg.1-1 |
roundcubeDebian:14 |
before 1.4.5+dfsg.1-1 | 1.4.5+dfsg.1-1 |
roundcubeDebian:9 |
before 1.2.3+dfsg.1-4+deb9u5, plus listed versions 1.2.3+dfsg.1-41.2.3+dfsg.1-4+deb9u11.2.3+dfsg.1-4+deb9u21.2.3+dfsg.1-4+deb9u31.2.3+dfsg.1-4+deb9u4 |
1.2.3+dfsg.1-4+deb9u5 |
roundcubeDebian:10 |
before 1.3.13+dfsg.1-1~deb10u1, plus listed versions 1.3.10+dfsg.1-11.3.10+dfsg.1-1~deb10u11.3.11+dfsg.1-1~deb10u11.3.8+dfsg.1-2 |
1.3.13+dfsg.1-1~deb10u1 |
roundcubemailMageia:7 |
before 1.3.12-1.mga7 | 1.3.12-1.mga7 |
roundcubeUbuntu:Pro:16.04:LTS |
before 1.2~beta+dfsg.1-0ubuntu1+esm2, plus listed versions 1.1.1+dfsg.1-21.1.2+dfsg.1-51.1.3+dfsg.1-11.1.4+dfsg.1-11.2~beta+dfsg.1-0ubuntu11.2~beta+dfsg.1-0ubuntu1+esm1 |
1.2~beta+dfsg.1-0ubuntu1+esm2 |
roundcubeUbuntu:Pro:18.04:LTS |
before 1.3.6+dfsg.1-1ubuntu0.1~esm2, plus listed versions 1.3.0+dfsg.1-11.3.1+dfsg.1-11.3.3+dfsg.1-11.3.3+dfsg.1-21.3.6+dfsg.1-11.3.6+dfsg.1-1ubuntu0.1~esm1 |
1.3.6+dfsg.1-1ubuntu0.1~esm2 |
roundcubeUbuntu:Pro:20.04:LTS |
before 1.4.3+dfsg.1-1ubuntu0.1~esm1, plus listed versions 1.3.8+dfsg.1-21.3.10+dfsg.1-11.4.1+dfsg.1-21.4.2+dfsg.1-11.4.2+dfsg.1-21.4.3+dfsg.1-1 |
1.4.3+dfsg.1-1ubuntu0.1~esm1 |
roundcubeUbuntu:Pro:20.04:LTS |
before 1.4.3+dfsg.1-1ubuntu0.1~esm2, plus listed versions 1.3.8+dfsg.1-21.3.10+dfsg.1-11.4.1+dfsg.1-21.4.2+dfsg.1-11.4.2+dfsg.1-21.4.3+dfsg.1-11.4.3+dfsg.1-1ubuntu0.1~esm1 |
1.4.3+dfsg.1-1ubuntu0.1~esm2 |
roundcubeUbuntu:Pro:22.04:LTS |
before 1.5.0+dfsg.1-2ubuntu0.1~esm1, plus listed versions 1.4.11+dfsg.1-41.5.0+dfsg.1-2 |
1.5.0+dfsg.1-2ubuntu0.1~esm1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | mbadanoiu/CVE-2020-13965 | 2024-04-13 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-13965 is a medium vulnerability (CVSS 6.1) in Roundcube Webmail, published June 9, 2020. CISA lists it as known to be exploited, since June 26, 2024. EUVD reports exploitation since June 26, 2024. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 76.6%, the 99th percentile. Fixed in roundcube 1.3.12.
References
github.com/roundcube/roundcubemail/releases/tag/1.4.5
github.com/roundcube/roundcubemail/releases/tag/1.3.12
github.com/roundcube/roundcubemail/commit/884eb611627ef2bd5a2e20e02009ebb1eceecdc3
github.com/roundcube/roundcubemail/compare/1.4.4...1.4.5
roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12
debian.org/security/2020/dsa-4700
Show 26 moreShow less
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DLESQ4LPJGMSWHQ4TBRTVQRDG7IXAZCW
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ODPJXBHZ32QSP4MYT2OBCALYXSUJ47SK
github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-13965-Cross%20Site-Scripting%20via%20Malicious%20XML%20Attachment-Roundcube
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-13965
nvd.nist.gov/vuln/detail/CVE-2020-13965
lists.fedoraproject.org/archives/list/[email protected]/message/DLESQ4LPJGMSWHQ4TBRTVQRDG7IXAZCW
lists.fedoraproject.org/archives/list/[email protected]/message/ODPJXBHZ32QSP4MYT2OBCALYXSUJ47SK
github.com/advisories/GHSA-44qp-5pm8-6j8p
security-tracker.debian.org/tracker/CVE-2020-13965
advisories.mageia.org/MGASA-2020-0261.html
bugs.mageia.org/show_bug.cgi?id=26720
ubuntu.com/security/CVE-2020-13965
ubuntu.com/security/notices/USN-5182-1
cve.org/CVERecord?id=CVE-2020-13965
cisa.gov/known-exploited-vulnerabilities-catalog
ubuntu.com/security/CVE-2020-12625
ubuntu.com/security/CVE-2020-12626
ubuntu.com/security/CVE-2020-12640
ubuntu.com/security/CVE-2020-12641
ubuntu.com/security/CVE-2020-13964
ubuntu.com/security/CVE-2020-15562
ubuntu.com/security/CVE-2020-16145
ubuntu.com/security/CVE-2020-35730
ubuntu.com/security/CVE-2021-44025
ubuntu.com/security/CVE-2021-44026
ubuntu.com/security/CVE-2021-46144