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Security Announcements

This feed provides announcements of resolved security issues in Joomla! software releases.

For more information about the Joomla! Security Strike Team (JSST) and its processes, please review our Security article.

To report potential security issues, please follow the guidelines in the above referenced article. Please note that we are only able to provide support for the Joomla! CMS, Joomla! Framework, and *.joomla.org network of websites.

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[20180803] - Core - ACL Violation in custom fields

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Low
  • Severity: Low
  • Versions: 3.7.0 through 3.8.11
  • Exploit type: ACL Violation
  • Reported Date: 2018-July-10
  • Fixed Date: 2018-August-28
  • CVE Number: CVE-2018-15881

Description

Inadequate checks regarding disabled fields can lead to an ACL violation.

Affected Installs

Joomla! CMS versions 3.7.0 through 3.8.11

Solution

Upgrade to version 3.8.12

Contact

The JSST at the Joomla! Security Centre.

Reported By: Elisa Foltyn, COOLCAT CREATIONS

[20180802] - Core - Stored XSS vulnerability in the frontend profile

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Low
  • Severity: Low
  • Versions: 1.5.0 through 3.8.11
  • Exploit type: XSS
  • Reported Date: 2018-July-10
  • Fixed Date: 2018-August-28
  • CVE Number: CVE-2018-15880

Description

Inadequate output filtering on the user profile page could lead to a stored XSS attack.

Affected Installs

Joomla! CMS versions 1.5.0 through 3.8.11

Solution

Upgrade to version 3.8.12

Contact

The JSST at the Joomla! Security Centre.

Reported By: Fouad Maakor

[20180801] - Core - Hardening the InputFilter for PHAR stubs

  • Project: Joomla!
  • SubProject: CMS
  • Impact: High
  • Severity: Low
  • Versions: 1.5.0 through 3.8.11
  • Exploit type: Malicious file upload
  • Reported Date: 2018-August-23
  • Fixed Date: 2018-August-28
  • CVE Number: CVE-2018-15882

Description

Inadequate checks in the InputFilter class could allow specifically prepared PHAR files to pass the upload filter.

Affected Installs

Joomla! CMS versions 1.5.0 through 3.8.11

Solution

Upgrade to version 3.8.12

Contact

The JSST at the Joomla! Security Centre.

Reported By: Davide Tampellini

[20180602] - Core - XSS vulnerability in language switcher module

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Low
  • Severity: Low
  • Versions: 1.6.0 through 3.8.8
  • Exploit type: XSS
  • Reported Date: 2018-May-07
  • Fixed Date: 2018-June-26
  • CVE Number: CVE-2018-12711

Description

In some cases the link of the current language might contain unescaped HTML special characters. This may lead to reflective XSS via injection of arbitrary parameters and/or values on the current page url.

Affected Installs

Joomla! CMS versions 1.6.0 through 3.8.8

Solution

Upgrade to version 3.8.9

Contact

The JSST at the Joomla! Security Centre.

Reported By: Borja Lorenzo, Innotecsystem

[20180601] - Core - Local File Inclusion with PHP 5.3

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Low
  • Severity: Low
  • Versions: 2.5.0 through 3.8.8
  • Exploit type: LFI
  • Reported Date: 2018-April-23
  • Fixed Date: 2018-June-26
  • CVE Number: CVE-2018-12712

Description

Our autoload code checks classnames to be valid, using the "class_exists" function in PHP. In PHP 5.3 this function validates invalid names as valid, which can result in a Local File Inclusion.

Affected Installs

Joomla! CMS versions 2.5.0 through 3.8.8

Solution

Upgrade to version 3.8.9

Contact

The JSST at the Joomla! Security Centre.

Reported By: Davide Tampellini

[20180509] - Core - XSS vulnerability in the media manager

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Low
  • Severity: Low
  • Versions: 1.5.0 through 3.8.7
  • Exploit type: XSS
  • Reported Date: 2017-October-28
  • Fixed Date: 2018-May-22
  • CVE Number: CVE-2018-6378

Description

Inadequate filtering of file and folder names lead to various XSS attack vectors in the media manager.

Affected Installs

Joomla! CMS versions 1.5.0 through 3.8.7

Solution

Upgrade to version 3.8.8

Contact

The JSST at the Joomla! Security Centre.

Reported By: David Jardin, JSST

[20180508] - Core - Possible XSS attack in the redirect method

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Low
  • Severity: Low
  • Versions: 3.1.2 through 3.8.7
  • Exploit type: XSS
  • Reported Date: 2018-March-30
  • Fixed Date: 2018-May-22
  • CVE Number: CVE-2018-11328

Description

Under specific circumstances (a redirect issued with a URI containing a username and password when the Location: header cannot be used), a lack of escaping the user-info component of the URI could result in a XSS vulnerability.

Affected Installs

Joomla! CMS versions 3.1.2 through 3.8.7

Solution

Upgrade to version 3.8.8

Contact

The JSST at the Joomla! Security Centre.

Reported By: David Jardin, JSST

[20180507] - Core - Session deletion race condition

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Medium
  • Severity: Low
  • Versions: 3.0.0 through 3.8.7
  • Exploit type: Session race condition
  • Reported Date: 2017-July-08
  • Fixed Date: 2018-May-22
  • CVE Number: CVE-2018-11324

Description

A long running background process, such as remote checks for core or extension updates, could create a race condition where a session which was expected to be destroyed would be recreated.

Affected Installs

Joomla! CMS versions 3.0.0 through 3.8.7

Solution

Upgrade to version 3.8.8

Additional Resources

Contact

The JSST at the Joomla! Security Centre.

Reported By: David Jardin, JSST

[20180506] - Core - Filter field in com_fields allows remote code execution

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Moderate
  • Severity: Low
  • Versions: 3.7.0 through 3.8.7
  • Exploit type: Remote Code Execution
  • Reported Date: 2018-May-14
  • Fixed Date: 2018-May-22
  • CVE Number: CVE-2018-11321

Description

Inadequate filtering allows users authorised to create custom fields to manipulate the filtering options and inject an unvalidated option.

Affected Installs

Joomla! CMS versions 3.7.0 through 3.8.7

Solution

Upgrade to version 3.8.8

Contact

The JSST at the Joomla! Security Centre.

Reported By: Benjamin Trenkle, JSST

[20180505] - Core - XSS Vulnerabilities & additional hardening

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Moderate
  • Severity: Moderate
  • Versions: 3.0.0 through 3.8.7
  • Exploit type:XSS
  • Reported Date:2018-February-02 & 2018-March-27
  • Fixed Date: 2018-May-22
  • CVE Number: CVE-2018-11326

Description

Inadequate input filtering leads to multiple XSS vulnerabilities. Additionally, the default filtering settings could potentially allow users of the default Administrator user group to perform a XSS attack.

Affected Installs

Joomla! CMS versions 3.0.0 through 3.8.7

Solution

Upgrade to version 3.8.8

Additional Resources

Contact

The JSST at the Joomla! Security Centre.

Reported By: Kai Zhao of 3H Security Team & Zhouyuan Yang (FortiGuard Labs)
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