[20230501] - Core - Open Redirect and XSS within the mfa select

published 2023-05-30 3 y ago modified 2026-09-08 2 mo ago also BIT-joomla-2023-23754 , EUVD-2023-27840

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits: 0; none known

An issue was discovered in Joomla! 4.2.0 through 4.3.1. Lack of input validation caused an open redirect and XSS issue within the new mfa selection screen.

Patch / fix

fixed in 2

bitnami joomla 4.3.2
joomla joomla! 4.3.2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 21 mo ago (2025-01-09)

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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	>=4.2.0, <4.3.2	4.3.2

Affected products

Joomla! Project Joomla! CMS

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation
CWE-20 Improper Input Validation
CWE-601 URL Redirection to Untrusted Site

References

developer.joomla.org /security-centre/899-20230501-core-open-redirects-and-xss-within-the-mfa-selection.html
vendor-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2023-23754
web

Sources

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.

Summary