Affected versions: ≥ 5.0.0 and < 5.2.1
Full advisory: our disclosure post
CVE-2026-97161CriticalCVSS 9.2Published 26 September 2026
UP Universal Plugin (plg_content_up) 5.0.0 to 6.0.29 - Unauthenticated Remote Code Installation, File Read, SQL Injection and PHP Injection
UP (the Universal Plugin for Joomla, plg_content_up) versions 5.0.0 to 6.0.29 have several flaws found and reported by mySites.guru. Unauthenticated: a request to Joomla's AJAX endpoint could trigger installation of action code from GitHub with TLS checks disabled (CVE-2026-97163, CVSS 4.0 10.0), read arbitrary files including configuration.php and create files outside the intended folder (CVE-2026-97161, 9.2), plus SQL injection vectors (CVE-2026-97162, 8.3). The PHP and SQL actions reserved to administrators could be reached by article authors through action-name variants (PHP command injection, CVE-2026-97160, 9.4). Fixed in UP 6.1.0 (Joomla 5.2 to 6.x) and UP 5.2.1 (Joomla 3.10 to 5.1), released 26 Sep 2026. Update to the fixed release for your Joomla version; if you cannot, disable the plugin. Check the plugin folder for action directories or PHP files you did not add.
Affected versions: ≥ 5.0.0 and < 5.2.1
Official record: cve.org · NVD
Every connected Joomla site is checked against these rules on each audit, and flagged if it runs an affected version.
How CVE-2026-97161 is scored
The base metrics as Joomla CNA published them, and what each one means for a site running an affected version. Threat and environmental metrics are left out: they describe a moment or a particular install rather than the flaw.
9.2 Critical
CVSS 4.0, scored by Joomla CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:NHow it is reached
- AV:N Attack vector
- Network. Reachable across the internet
- AC:L Attack complexity
- Low. Nothing to work around, it just works
- AT:N Attack requirements
- None. Works against any affected install
- PR:N Privileges required
- None. No account needed
- UI:N User interaction
- None. Nobody has to be tricked into anything
What it does to the site
- VC:H Confidentiality
- High. Everything the site holds can be read
- VI:N Integrity
- None. Nothing can be altered
- VA:N Availability
- None. The site stays up
What it does beyond the site
- SC:H Confidentiality
- High. Data on other systems can be read
- SI:N Integrity
- None. Other systems keep their integrity
- SA:N Availability
- None. Other systems stay up
Affected extensions and versions
UP Universal Plugin - UP Universal Plugin (plg_content_up) 5.0.0 to 6.0.29 - Unauthenticated Remote Code Installation, File Read, SQL Injection and PHP Injection
UP (the Universal Plugin for Joomla, plg_content_up) versions 5.0.0 to 6.0.29 have several flaws found and reported by mySites.guru. Unauthenticated: a request to Joomla's AJAX endpoint could trigger installation of action code from GitHub with TLS checks disabled (CVE-2026-97163, CVSS 4.0 10.0), read arbitrary files including configuration.php and create files outside the intended folder (CVE-2026-97161, 9.2), plus SQL injection vectors (CVE-2026-97162, 8.3). The PHP and SQL actions reserved to administrators could be reached by article authors through action-name variants (PHP command injection, CVE-2026-97160, 9.4). Fixed in UP 6.1.0 (Joomla 5.2 to 6.x) and UP 5.2.1 (Joomla 3.10 to 5.1), released 26 Sep 2026. Update to the fixed release for your Joomla version; if you cannot, disable the plugin. Check the plugin folder for action directories or PHP files you did not add.
Affected versions: ≥ 6.0.0 and < 6.1.0
Full advisory: our disclosure post
Our disclosure post
Running an affected version on a site you manage?
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Rules current as of 26 September 2026.