What is CVE-2023-31544?

CVE-2023-31544 is a medium-severity vulnerability in Alkacon Opencms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-05-16.

How severe is CVE-2023-31544?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Alkacon Opencms

CVE-2023-31544

A stored cross-site scripting (XSS) vulnerability in alkacon-OpenCMS v11.0.0.0 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Title field under the Upload Image module.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-05-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (32.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

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

Affected products

Alkacon Opencms — versions 11.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/alkacon/opencms-core/issues/652 (Exploit, Third Party Advisory, Issue Tracking)
github.com/alkacon/opencms-core/commit/21bfbeaf6b038e2c03bb421ce7f0933dd7a7633e (Patch)

Frequently asked questions

What is CVE-2023-31544?: CVE-2023-31544 is a medium-severity vulnerability in Alkacon Opencms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-05-16.
How severe is CVE-2023-31544?: Medium severity. CVSS v3 base score is 5.4 out of 10.