Joomla! XSS Vulnerability
An issue was discovered in Joomla! Core starting in 3.0.0 and prior to 3.8.8. Inadequate input filtering leads to a multiple XSS vulnerabilities. Additionally, the default filtering settings could potentially allow users of the default Administrator user group to perform a XSS attack.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | joomla/joomla-cms | >= 3.0.0, < 3.8.8 | 3.8.8 |
| Joomla (core) | joomla/joomla-cms | >= 3.0.0, < 3.8.8 | 3.8.8 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2018-11326
- https://developer.joomla.org/security-centre/733-20180505-core-xss-vulnerabilities-additional-hadering.html
- https://github.com/joomla/joomla-cms
- https://web.archive.org/web/20210124173032/http://www.securityfocus.com/bid/104270
- https://web.archive.org/web/20211129145422/http://www.securitytracker.com/id/1040966
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- Composer, Joomla
- Package
joomla/joomla-cms- Disclosed
- 14.05.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-g3m5-vvj7-xrwv - CC BY 4.0
Vulnerability history: joomla/joomla-cms
All published vulnerabilities of this package (Joomla (core)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 8
- First → latest
- 05.2022 04.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 1
- Medium 4
- Low 2
Disclosures per year
- 2022: 7
- 2023: 0
- 2024: 0
- 2025: 1
- 2026: 0
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Joomla! XSS Vulnerability this entry
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