CVE-2021-23124 json
[20210102] - Core - XSS in mod_breadcrumbs aria-label attribute
published 2021-01-12 5 y ago modified 2026-09-08 2 mo ago also BIT-joomla-2021-23124 , EUVD-2021-10242
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 79.0%
- EPSS 79.0% chance of exploitation in 30 days, percentile 99.5%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
78.96% chance of exploitation in the next 30 days, higher than 99.5% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| OSV | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | joomla | >=3.9.0, <=3.9.23 |
no fix listed |
Affected products
- Joomla! Project Joomla! CMS
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
Sources
- CVE List CVE-2021-23124
- NVD CVE-2021-23124
- OSV BIT-joomla-2021-23124
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.