CVE-2021-24533: unknown maintenance Cross-site Scripting
Vulnerability summary
CVE-2021-24533 is a medium (CVSS 4.8) Cross-site Scripting vulnerability in unknown maintenance. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 48.6% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 4.03.
Timeline
- 23-08-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
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
CVSS metrics
3 scores · 2 sources · 2 versions- wordfenceSource4.8MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
0.62%
Chance of exploitation in the next 30 days
Percentile
49%
Versus all other CVEs
30-day change
0.00 pp
From 0.62% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (wpscan.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Unknown1 product
- maintenance≥ 4.03, < 4.03
Webfactoryltd1 product
- maintenance< 4.03
Wordpress1 product
- maintenance< 4.03
3 vendors · 3 products
References
2 links- wpscan.com/vulnerability/174b2119-b806-4da4-a23d-c19b552c86cbX Refsource MISCExploitThird Party Advisory