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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Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 2.5.0 - 3.9.27
Exploit type: DoS
Reported Date: 2021-06-08
Fixed Date: 2021-07-06
CVE Number: CVE-2021-26036

Description

Missing validation of input could lead to a broken usergroups table.

Affected Installs

Joomla! CMS versions 2.5.0 - 3.9.27

Solution

Upgrade to version 3.9.28

Contact

The JSST at the Joomla! Security Centre.

Reported By: Hoang Kien from VSEC

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 3.0.0 - 3.9.27
Exploit type: XSS
Reported Date: 2021-05-29
Fixed Date: 2021-07-06
CVE Number: CVE-2021-26035

Description

Inadequate escaping in the Rules field of the JForm API leads to a XSS vulnerability.

Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.27

Solution

Upgrade to version 3.9.28

Contact

The JSST at the Joomla! Security Centre.

Reported By: Hoang Nguyen

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 3.0.0 - 3.9.26
Exploit type: CSRF
Reported Date: 2021-05-07
Fixed Date: 2021-05-25
CVE Number: CVE-2021-26034

Description

A missing token check causes a CSRF vulnerability in data download endpoints in com_banners and com_sysinfo.

Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.26

Solution

Upgrade to version 3.9.27

Contact

The JSST at the Joomla! Security Centre.

Reported By: Phil Taylor

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 3.0.0 - 3.9.26
Exploit type: CSRF
Reported Date: 2021-05-07
Fixed Date: 2021-05-25
CVE Number: CVE-2021-26033

Description

A missing token check causes a CSRF vulnerability in the AJAX reordering endpoint.

Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.26

Solution

Upgrade to version 3.9.27

Contact

The JSST at the Joomla! Security Centre.

Reported By: Phil Taylor

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 3.0.0 - 3.9.26
Exploit type: XSS
Reported Date: 2021-03-05
Fixed Date: 2021-05-25
CVE Number: CVE-2021-26032

Description

HTML was missing in the executable block list of MediaHelper::canUpload, leading to XSS attack vectors.

Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.26

Solution

Upgrade to version 3.9.27

Contact

The JSST at the Joomla! Security Centre.

Reported By: Adrian Tiron, Fortbridge

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 3.0.0 - 3.9.25
Exploit type: LFI
Reported Date: 2021-01-03
Fixed Date: 2021-04-13
CVE Number: CVE-2021-26031

Description

Inadequate filters on module layout settings could lead to an LFI.

Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.25

Solution

Upgrade to version 3.9.26

Contact

The JSST at the Joomla! Security Centre.

Reported By: Lee Thao from Viettel Cyber Security

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 3.0.0 - 3.9.25
Exploit type: XSS
Reported Date: 2021-03-09
Fixed Date: 2021-04-13
CVE Number: CVE-2021-26030

Description

Inadequate escaping allowed XSS attacks using the logo parameter of the default templates on error pages.

Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.25

Solution

Upgrade to version 3.9.26

Contact

The JSST at the Joomla! Security Centre.

Reported By: HOANG NGUYEN

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 3.2.0 - 3.9.24
Exploit type: Improper Input Validation
Reported Date: 2020-05-07
Fixed Date: 2021-03-02
CVE Number: CVE-2021-23131

Description

Missing input validation within the template manager.

Affected Installs

Joomla! CMS versions 3.2.0 - 3.9.24

Solution

Upgrade to version 3.9.25

Contact

The JSST at the Joomla! Security Centre.

Reported By: Bui Duc Anh Khoa from Zalo Security Team

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 3.2.0 - 3.9.24
Exploit type: Insecure Randomness
Reported Date: 2021-01-12
Fixed Date: 2021-03-02
CVE Number: CVE-2021-23126, CVE-2021-23127

Description

Usage of the insecure rand() function within the process of generating the 2FA secret.
Usage of an insufficient length for the 2FA secret accoring to RFC 4226 of 10 bytes vs 20 bytes.

Additional details as well as a more contexts for exising sites can be found in the docs: https://docs.joomla.org/J3.x:Changes_to_the_2FA_token_generation_recommendations_for_existing_sites

This issue has been coordinated with Akeeba Ltd as contributor of the original FOF codebase to the core.

Affected Installs

Joomla! CMS versions 3.2.0 - 3.9.24

Solution

Upgrade to version 3.9.25

Contact

The JSST at the Joomla! Security Centre.

Reported By: Hanno Böck

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 3.2.0 - 3.9.24
Exploit type: Insecure Randomness
Reported Date: 2021-01-13
Fixed Date: 2021-03-02
CVE Number: CVE-2021-23128

Description

The core shipped but unused randval implementation within FOF (FOFEncryptRandval) used an potential insecure implemetation. That has now been replaced with a call to "random_bytes()" and its backport that is shipped within random_compat.

This issue has been coordinated with Akeeba Ltd as contributor of the original FOF codebase to the core.

Affected Installs

Joomla! CMS versions 3.2.0 - 3.9.24

Solution

Upgrade to version 3.9.25

Contact

The JSST at the Joomla! Security Centre.

Reported By: Hanno Böck

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