CVE-2021-4388: wordpress opal-estate Missing Authorization
Vulnerability summary
CVE-2021-4388 is a medium (CVSS 5.3) Missing Authorization vulnerability in wordpress opal-estate. EPSS estimates a 0.73% chance of exploitation in the next 30 days, higher than 53.6% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 01-07-2023PublishedVulnerability first disclosed.
- 08-04-2026Last modifiedVulnerability information updated.
Description
The Opal Estate plugin for WordPress is vulnerable to featured property modifications in versions up to, and including, 1.6.11. This is due to missing capability checks on the opalestate_set_feature_property() and opalestate_remove_feature_property() functions. This makes it possible for unauthenticated attackers to set and remove featured properties.
CVSS metrics
3 scores · 3 sources · 1 version- CVE.orgCNA4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NDiffers
- wordfenceSource4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NDiffers
EPSS trend
Probability
0.73%
Chance of exploitation in the next 30 days
Percentile
54%
Versus all other CVEs
30-day change
0.00 pp
From 0.73% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (blog.nintechnet.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Wordpress1 product
- opal-estate≤ 1.6.11
Wpopal1 product
- opal_estate≤ 1.6.11
2 vendors · 2 products
References
4 links- blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/ExploitThird Party Advisory