CVE-2021-23124
[20210102] - Core - XSS in mod_breadcrumbs aria-label attribute
An issue was discovered in Joomla! 3.9.0 through 3.9.23. The lack of escaping in mod_breadcrumbs aria-label attribute allows XSS attacks.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in Joomla! 3.9.0 through 3.9.23. The lack of escaping in mod_breadcrumbs aria-label attribute allows XSS attacks.
- Record
CVE-2021-23124- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
[20210102] - Core - XSS in mod_breadcrumbs aria-label attribute
An issue was discovered in Joomla! 3.9.0 through 3.9.23. The lack of escaping in mod_breadcrumbs aria-label attribute allows XSS attacks.
- Record
CVE-2021-23124- Updated
- 2026-11-02
EUVDEUVD-2021-10242 No score
An issue was discovered in Joomla! 3.9.0 through 3.9.23. The lack of escaping in mod_breadcrumbs aria-label attribute allows XSS attacks.
- Record
EUVD-2021-10242- Updated
- 2026-11-02
GitHub AdvisoriesGHSA-mhvc-g5wh-hrxg No score
An issue was discovered in Joomla! 3.9.0 through 3.9.23. The lack of escaping in mod_breadcrumbs...
An issue was discovered in Joomla! 3.9.0 through 3.9.23. The lack of escaping in mod_breadcrumbs aria-label attribute allows XSS attacks.
- Record
GHSA-mhvc-g5wh-hrxg- Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
An issue was discovered in Joomla! 3.9.0 through 3.9.23. The lack of escaping in mod_breadcrumbs aria-label attribute allows XSS attacks.
- Record
CVE-2021-23124- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVBIT-joomla-2021-23124 No score
[20210102] - Core - XSS in mod_breadcrumbs aria-label attribute
An issue was discovered in Joomla! 3.9.0 through 3.9.23. The lack of escaping in mod_breadcrumbs aria-label attribute allows XSS attacks.
- Record
BIT-joomla-2021-23124- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
joomlaBitnami |
3.9.0 to 3.9.23 | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-23124 is a medium vulnerability (CVSS 6.1) in Joomla Joomla\!, published January 12, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 79.0%, the 99th percentile. No source names a fixed version.