What is CVE-2023-5509?

CVE-2023-5509 is a medium-severity vulnerability in Premio Mystickymenu, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2023-11-20.

How severe is CVE-2023-5509?

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

Is CVE-2023-5509 known to be exploited?

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

Auth bypass in Premio Mystickymenu

CVE-2023-5509

The myStickymenu WordPress plugin before 2.6.5 does not adequately authorize some ajax calls, allowing any logged-in user to perform the actions.

Vulnerability class: Broken Access Control

Published 2023-11-20 · 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:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.005 (41.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.9% 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

Premio Mystickymenu
Floating Notification Bar, Sticky Menu On Scroll, Announcement Banner, And Header For Any Theme — versions 0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

Public proof-of-concept exploits

20142995/nuclei-templates

References

wpscan.com/vulnerability/3b33c262-e7f0-4310-b26d-4727d7c25c9d (Product, Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2023-5509?: CVE-2023-5509 is a medium-severity vulnerability in Premio Mystickymenu, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2023-11-20.
How severe is CVE-2023-5509?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2023-5509 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.