What is CVE-2023-36339?

CVE-2023-36339 is a high-severity vulnerability in Webboss Webboss.io Cms, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2023-07-21.

How severe is CVE-2023-36339?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Webboss Webboss.io Cms

CVE-2023-36339

An access control issue in WebBoss.io CMS v3.7.0.1 allows attackers to access the Website Backup Tool via a crafted GET request.

Vulnerability class: Broken Access Control

Published 2023-07-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (45.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.8% 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

Webboss Webboss.io Cms

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

webboss.feedbear.com/updates (Release Notes)
www.realinfosec.net/advisories/WEBBOSS-CMS-IDOR-2023-0xv3jsv.html (Third Party Advisory)

Frequently asked questions

What is CVE-2023-36339?: CVE-2023-36339 is a high-severity vulnerability in Webboss Webboss.io Cms, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2023-07-21.
How severe is CVE-2023-36339?: High severity. CVSS v3 base score is 7.5 out of 10.