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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[20210502] - Core - CSRF in AJAX reordering endpoint
- 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.
[20210501] - Core - Adding HTML to the executable block list of MediaHelper::canUpload
- 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.
[20210402] - Core - Inadequate filters on module layout settings
- 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.
[20210401] - Core - Escape xss in logo parameter error pages
- 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.
[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.
[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.
[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.
[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.
[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.
[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.