Joomla: >> Joomla! >> 3.10.12 Security Vulnerabilities
Joomla! Core - [20260916] - Core - XSS filter bypass in InputFilter via whitespace characters in HTML data URIs in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - The cleanAttribute method removes HTML data URIs, however injected whitespaces characters could circumvent that cleanup, causing an XSS vector.
CVSS Score
7.1
EPSS Score
0.002
Published
2026-09-29
Joomla! Core - [20260915] - Core - XSS filter bypass in InputFilter via HTML5 entity decode mismatch in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - The checkAttribute method normalized an attribute value before testing it against the "javascript:" scheme regex, however without decoding HTML5 entities beforehand, causing an XSS vector.
CVSS Score
7.1
EPSS Score
0.003
Published
2026-09-29
Joomla! Core - [20260902] - Core - Unauthorized user account creation via profile.save controller in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - The profile.save controller did not check the login state of a user, allowing the creation of guest-level users on sites without active user registration.
CVSS Score
6.9
EPSS Score
0.002
Published
2026-09-29
Joomla! Core - [20260901] - XSS in HTMLHelper::link method in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - Lack of escaping leads to XSS vulnerabilities in the link method of the HTML Helper.
CVSS Score
5.9
EPSS Score
0.002
Published
2026-09-29
Joomla! Core - [20260801] - Response header injection in download views in Joomla 3.0.0-5.4.7, 6.0.0-6.1.2 - Lack of output processing allowed a header injection in the multiple download views, leading to reflected file download / content-type confusion.
CVSS Score
4.8
EPSS Score
0.002
Published
2026-08-18
Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2 - The default list of dangerous files did not include SHTML files. On servers that executed these files, that could lead to code execution.
CVSS Score
8.9
EPSS Score
0.006
Published
2026-08-18
Improper validation leads to a generic XSS vector in the language override feature.
CVSS Score
5.9
EPSS Score
0.002
Published
2026-07-07
An improper access check allows user to download vcard exports of com_contact contacts that are inaccessible.
CVSS Score
6.4
EPSS Score
0.004
Published
2026-07-07
Inadequate content filtering within the checkAttribute methods leads to XSS vulnerabilities in various components.
CVSS Score
6.9
EPSS Score
0.001
Published
2026-05-26
Lack of input filtering leads to an XSS vector in the HTML filter code.
CVSS Score
6.9
EPSS Score
0.001
Published
2026-05-26
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