What is CVE-2021-24533?

CVE-2021-24533 is a medium-severity vulnerability in Webfactoryltd Maintenance, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-08-23.

How severe is CVE-2021-24533?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Is CVE-2021-24533 known to be exploited?

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

XSS in Webfactoryltd Maintenance

CVE-2021-24533

The Maintenance WordPress plugin before 4.03 does not sanitise or escape some of its settings, allowing high privilege users such as admin to se Cross-Site Scripting payload in them (even when the unfiltered_html capability is disallowed), which will be triggered in the frontend

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-08-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.5% 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

Webfactoryltd Maintenance
Maintenance — versions 4.03

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

wpscan.com/vulnerability/174b2119-b806-4da4-a23d-c19b552c86cb (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-24533?: CVE-2021-24533 is a medium-severity vulnerability in Webfactoryltd Maintenance, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-08-23.
How severe is CVE-2021-24533?: Medium severity. CVSS v3 base score is 4.8 out of 10.
Is CVE-2021-24533 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.