What is CVE-2023-5559?

CVE-2023-5559 is a critical-severity vulnerability in 10web Booster, classified under CWE-862 MISSING AUTHORIZATION. CVSS score: 9.1/10. Published 2023-11-27.

How severe is CVE-2023-5559?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2023-5559 known to be exploited?

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

Vulnerability in 10web Booster

CVE-2023-5559

The 10Web Booster WordPress plugin before 2.24.18 does not validate the option name given to some AJAX actions, allowing unauthenticated users to delete arbitrary options from the database, leading to denial of service.

Published 2023-11-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.028 (85.9th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000

Affected products

10web Booster
10web Booster — versions 0

Public proof-of-concept exploits

References

wpscan.com/vulnerability/eba46f7d-e4db-400c-8032-015f21087bbf (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2023-5559?: CVE-2023-5559 is a critical-severity vulnerability in 10web Booster, classified under CWE-862 MISSING AUTHORIZATION. CVSS score: 9.1/10. Published 2023-11-27.
How severe is CVE-2023-5559?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2023-5559 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.