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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...

6.1 MediumIn KEVPublic exploitFix available

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

76.6%Up 74.4 points since Apr 14, 2021
90%50%10%1%

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 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
CVSS 2.0
4.3 MediumAV: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 MediumCVSS: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 MediumCVSS: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 MediumCVSS: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 MediumCVSS: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 MediumCVSS: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 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
CVSS 3.1
6.1 MediumCVSS: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

Affected packages
PackageAffectedFixed
roundcube
Bitnami
before 1.3.12, 1.4.0 up to 1.4.5
1.3.121.4.5
roundcube
Debian:12
before 1.4.5+dfsg.1-1
1.4.5+dfsg.1-1
roundcube
Debian:13
before 1.4.5+dfsg.1-1
1.4.5+dfsg.1-1
roundcube
Debian:14
before 1.4.5+dfsg.1-1
1.4.5+dfsg.1-1
roundcube
Debian: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
roundcube
Debian: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
roundcubemail
Mageia:7
before 1.3.12-1.mga7
1.3.12-1.mga7
roundcube
Ubuntu: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
roundcube
Ubuntu: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
roundcube
Ubuntu: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
roundcube
Ubuntu: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
roundcube
Ubuntu: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.

Public exploits
SourceLinkDate
PoC in GitHubmbadanoiu/CVE-2020-139652024-04-13

History

History
RecordedChangedSources
exploitation
first indexedCVE 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

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