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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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[20210305] - Core - Input validation within the template manager

  • 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

[20210301] - Core - Insecure randomness within 2FA secret generation

  • 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

[20210302] - Core - Potential Insecure FOFEncryptRandval

  • 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

[20210303] - Core - XSS within alert messages showed to users

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Moderate
  • Severity: Low
  • Versions: 2.5.0 - 3.9.24
  • Exploit type: XSS
  • Reported Date: 2020-05-07
  • Fixed Date: 2021-03-02
  • CVE Number: CVE-2021-23129

Description

Missing filtering of messages showed to users that could lead to xss issues.

Affected Installs

Joomla! CMS versions 2.5.0 - 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

[20210308] - Core - Path Traversal within joomla/archive zip class

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Moderate
  • Severity: Low
  • Versions: 3.0.0 - 3.9.24
  • Exploit type: Path Traversal
  • Reported Date: 2020-09-08
  • Fixed Date: 2021-03-02
  • CVE Number: CVE-2021-26028

Description

Extracting an specifilcy crafted zip package could write files outside of the intended path.

Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.24

Solution

Upgrade to version 3.9.25

Contact

The JSST at the Joomla! Security Centre.

Reported By: Šarūnas Paulauskas, Lee Jinheon

[20210304] - Core - XSS within the feed parser library

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Moderate
  • Severity: Low
  • Versions: 2.5.0 - 3.9.24
  • Exploit type: XSS
  • Reported Date: 2020-05-05
  • Fixed Date: 2021-03-02
  • CVE Number: CVE-2021-23130

Description

Missing filtering of feed fields could lead to xss issues.

Affected Installs

Joomla! CMS versions 2.5.0 - 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

[20210306] - Core - com_media allowed paths that are not intended for image uploads

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Moderate
  • Severity: Low
  • Versions: 3.0.0 - 3.9.24
  • Exploit type: Improper Input Validation
  • Reported Date: 2020-02-17
  • Fixed Date: 2021-03-02
  • CVE Number: CVE-2021-23132

Description

com_media allowed paths that are not intended for image uploads.

Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.24

Solution

Upgrade to version 3.9.25

Contact

The JSST at the Joomla! Security Centre.

Reported By: Hoang Kien from VSEC

[20210307] - Core - ACL violation within com_content frontend editing

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Moderate
  • Severity: Low
  • Versions: 3.0.0 - 3.9.24
  • Exploit type: ACL violation
  • Reported Date: 2020-10-25
  • Fixed Date: 2021-03-02
  • CVE Number: CVE-2021-26027

Description

Incorrect ACL checks could allow unauthorized change of the category for an article.

Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.24

Solution

Upgrade to version 3.9.25

Contact

The JSST at the Joomla! Security Centre.

Reported By: Brian Teeman, George Wilson (JSST), David Jardin (JSST)

[20210309] - Core - Inadequate filtering of form contents could allow to overwrite the author field

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Moderate
  • Severity: Low
  • Versions: 1.6.0 - 3.9.24
  • Exploit type: ACL Violation
  • Reported Date: 2021-01-31
  • Fixed Date: 2021-03-02
  • CVE Number: CVE-2021-26029

Description

Inadequate filtering of form contents could allow to overwrite the author field. The affected core components are com_fields, com_categories, com_banners, com_contact, com_newsfeeds and com_tags. 

Affected Installs

Joomla! CMS versions 1.6.0 - 3.9.24

Solution

Upgrade to version 3.9.25

Contact

The JSST at the Joomla! Security Centre.

Reported By: DangKhai from Viettel Cyber Security

[20210103] - Core - XSS in com_tags image parameters

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Moderate
  • Severity: Low
  • Versions:3.1.0 - 3.9.23
  • Exploit type: XSS
  • Reported Date: 2020-09-01
  • Fixed Date: 2021-01-12
  • CVE Number: CVE-2021-23125

Description

Lack of escaping of image-related parameters in multiple com_tags views cause lead to XSS attack vectors.

Affected Installs

Joomla! CMS versions 3.1.0 - 3.9.23

Solution

Upgrade to version 3.9.24

Contact

The JSST at the Joomla! Security Centre.

Reported By: Šarūnas Paulauskas
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