What is CVE-2024-33423?

CVE-2024-33423 is a high-severity vulnerability in Cmsimple, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 7.4/10. Published 2024-05-01.

How severe is CVE-2024-33423?

High severity. CVSS v3 base score is 7.4 out of 10.

Is CVE-2024-33423 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Cmsimple

CVE-2024-33423

Cross-Site Scripting (XSS) vulnerability in the Settings menu of CMSimple v5.15 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Logout parameter under the Language section.

Published 2024-05-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Cmsimple — versions 5.15

Weakness classification (CWE)

CWE-80 — Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Public proof-of-concept exploits

adiapera/xss_

References

github.com/adiapera/xss_language_cmsimple_5.15 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2024-33423?: CVE-2024-33423 is a high-severity vulnerability in Cmsimple, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 7.4/10. Published 2024-05-01.
How severe is CVE-2024-33423?: High severity. CVSS v3 base score is 7.4 out of 10.
Is CVE-2024-33423 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.