What is CVE-2023-29009?

CVE-2023-29009 is a medium-severity vulnerability in Basercms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-10-27.

How severe is CVE-2023-29009?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Basercms

CVE-2023-29009

baserCMS is a website development framework with WebAPI that runs on PHP8 and CakePHP4. There is a XSS Vulnerability in Favorites Feature to baserCMS. This issue has been patched in version 4.8.0.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-10-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (38.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Basercms
Baserproject Basercms — versions < 4.8.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/baserproject/basercms/security/advisories/GHSA-8vqx-prq4-rqrq (Third Party Advisory)
basercms.net/security/JVN_45547161 (Vendor Advisory)
github.com/baserproject/basercms/releases/tag/basercms-4.8.0 (Release Notes)

Frequently asked questions

What is CVE-2023-29009?: CVE-2023-29009 is a medium-severity vulnerability in Basercms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-10-27.
How severe is CVE-2023-29009?: Medium severity. CVSS v3 base score is 6.1 out of 10.