What is CVE-2024-42699?

CVE-2024-42699 is a medium-severity vulnerability in Alkacon Opencms, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2025-04-21.

How severe is CVE-2024-42699?

Medium severity. CVSS v3 base score is 6.5 out of 10.

XSS in Alkacon Opencms

CVE-2024-42699

Cross Site Scripting vulnerability in Create/Modify article function in Alkacon OpenCMS 17.0 allows remote attacker to inject javascript payload via image title sub-field in the image field

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-04-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (26.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000

Affected products

Alkacon Opencms — versions 17.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/Sidd545-cr/CVE/blob/main/CVE-2024-42699 - Stored XSS in image title… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2024-42699?: CVE-2024-42699 is a medium-severity vulnerability in Alkacon Opencms, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2025-04-21.
How severe is CVE-2024-42699?: Medium severity. CVSS v3 base score is 6.5 out of 10.