[20260810] - Core - Unrestricted uploads of SHTML files
Joomla fixed CVE-2026-73373, an unrestricted SHTML file upload flaw affecting CMS 1.0.0-5.4.7 and 6.0.0-6.1.2 that can enable code execution.
Joomla published security advisory 20260810 for CVE-2026-73373, an unrestricted upload of files with dangerous type in Joomla CMS. The default dangerous-file list omitted SHTML files, which could lead to code execution on servers that execute SHTML. Affected versions are 1.0.0-5.4.7 and 6.0.0-6.1.2; fixes ship in 5.4.8 and 6.1.3. The issue was reported by Valentin Lobstein (Chocapikk) on 2026-07-29.
[20260809] - Core - Improper ACL checks when injection schema.org contact data
Joomla fixed CVE-2026-73372, an improper ACL check that leaks inaccessible contact items' data into schema.org snippets, affecting CMS 5.1.0-5.4.7 and 6.0.0-6.1.2.
Joomla security advisory 20260809 describes CVE-2026-73372, an incorrect access control issue when injecting schema.org contact data. Improper access checks inject contact information for inaccessible contact items into schema.org snippets, exposing restricted data. Affected versions are 5.1.0-5.4.7 and 6.0.0-6.1.2; fixes ship in 5.4.8 and 6.1.3. The issue was reported by Stefan Wendhausen on 2026-07-31.
[20260808] - Core - Improper ACL checks for batch copy actions
Joomla fixed CVE-2026-73371, an improper ACL check letting unauthorized users batch-copy uneditable items in Joomla CMS 4.0.0-5.4.7 and 6.0.0-6.1.2.
Joomla security advisory 20260808 describes CVE-2026-73371, an incorrect access control issue in batch copy actions. The flaw allows unauthorized users to perform copy batch operations on items they cannot edit. Affected versions are 4.0.0-5.4.7 and 6.0.0-6.1.2; fixes ship in 5.4.8 and 6.1.3. The issue was reported by Sabuhi Mammadov on 2026-07-28.
[20260807] - Core - MFA Authentication Bypass
Joomla fixed CVE-2026-73337, an MFA authentication bypass caused by insufficient state checks, affecting Joomla CMS 4.0.0-5.4.7 and 6.0.0-6.1.2.
Joomla security advisory 20260807 describes CVE-2026-73337, an authentication bypass in Joomla CMS multi-factor authentication. Insufficient state checks create a vector that allows 2FA checks to be bypassed; the vendor rates the impact as high with moderate probability. Affected versions are 4.0.0-5.4.7 and 6.0.0-6.1.2; fixes ship in 5.4.8 and 6.1.3. The issue was reported by bloman and Matej Rada on 2026-07-25.
[20260806] - Core - XSS through schema.org outputs
Joomla fixed CVE-2026-73336, an XSS in schema.org markup outputs caused by improper escaping, affecting CMS 5.1.0-5.4.7 and 6.0.0-6.1.2.
Joomla security advisory 20260806 describes CVE-2026-73336, a cross-site scripting issue in schema.org markup outputs. Improper escaping flags create an XSS vector in schema.org output; the vendor rates impact and severity as moderate with low probability. Affected versions are 5.1.0-5.4.7 and 6.0.0-6.1.2; fixes ship in 5.4.8 and 6.1.3. The issue was reported by Amin Isayev and Geo (GitHub.com/geo-chen) on 2026-07-21.
[20260805] - Core - Improper ACL checks for category webservice endpoints
Joomla fixes CVE-2026-72532, an improper ACL check letting unauthorized users create categories via webservice endpoints, in CMS 5.4.8/6.1.3.
Joomla disclosed an incorrect access control flaw (CVE-2026-72532) in category webservice endpoints, allowing unauthorized users to create categories for inaccessible components. It affects Joomla CMS 4.0.0-5.4.7 and 6.0.0-6.1.2 and is rated moderate impact and severity with low probability. The fix ships in Joomla 5.4.8 and 6.1.3 on 2026-08-18; it was reported by Amin Isayev and Geo.
[20260804] - Core - Improper ACL checks for custom fields webservice endpoints
Joomla patches CVE-2026-72531, an improper ACL check allowing unauthorized custom-field creation via webservice endpoints, in CMS 5.4.8/6.1.3.
Joomla disclosed an incorrect access control issue (CVE-2026-72531) letting unauthorized users create custom fields for inaccessible components through webservice endpoints. It affects Joomla CMS 4.0.0-5.4.7 and 6.0.0-6.1.2, rated moderate impact and severity with low probability. Fixed in Joomla 5.4.8 and 6.1.3; reported by ebadfd on 2026-07-06.
[20260803] - Core - Inconsistent ACL checks for mutating webservice endpoints
Joomla fixes CVE-2026-71574, inconsistent ACL checks letting unauthorized users mutate data via webservice APIs, in CMS 5.4.8/6.1.3.
Joomla disclosed an inconsistent access control flaw (CVE-2026-71574) in mutating webservice endpoints, where unauthorized users could perform mutations restricted in the backend UI; impact is rated high. It affects Joomla CMS 4.0.0-5.4.7 and 6.0.0-6.1.2, with moderate severity and low probability. The fix ships in Joomla 5.4.8 and 6.1.3 on 2026-08-18.