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CVE-2024-21726

48
FAUCET Score

CVE-2024-21726 describes multiple Cross-Site Scripting (XSS) vulnerabilities within various components of Joomla! due to inadequate content filtering. This medium-severity vulnerability (CVSS 6.5) can be exploited remotely with low attack complexity, potentially leading to limited impact on confidentiality and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered some community attention and media coverage, including a report linking it to potential RCE attacks.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.7.0, <= 3.10.15CPE matchmatch criteria
cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.4.3CPE matchmatch criteria
cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*
>= 5.0.0, < 5.0.3CPE matchmatch criteria
cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
48.84%
Probability of exploitation in next 30 days
EPSS Percentile
98.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.4884 is in the 99th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Remediation records are not available for this CVE.

References

developer.joomla.org / security-centre/929-20240205-core-inadequate-content-filtering-within-the-filter-code.html
Vendor Advisory
sonarsource.com / blog/joomla-multiple-xss-vulnerabilities
ExploitThird Party Advisory