CVE-2026-15939: unknown simple restrict Incorrect Authorization
Vulnerability summary
CVE-2026-15939 is a medium (CVSS 4.3) Incorrect Authorization vulnerability in unknown simple restrict. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21.3% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 1.2.9.
Timeline
- 02-08-2026PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
The Simple Restrict WordPress plugin before 1.2.9 does not enforce its content-restriction permission check on the REST API the way it does on the front end, relying there on a generic capability check instead of the Simple Restrict WordPress plugin before 1.2.9's own permission system, allowing users with contributor-level access or above to read the content of restricted posts and pages they were never granted access to.
CVSS metrics
3 scores · 3 sources · 1 version- CVE.orgCNA2.7LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:NDiffers
- NVDNIST2.7LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:NDiffers
EPSS trend
Probability
0.30%
Chance of exploitation in the next 30 days
Percentile
21%
Versus all other CVEs
30-day change
+0.12 pp
From 0.18% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (wpscan.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-863Incorrect AuthorizationThe product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
- CWE-200Exposure of Sensitive Information to an Unauthorized ActorThe product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
Affected systems
Unknown1 product
- simple restrict< 1.2.9
Wordpress1 product
- simple-restrict< 1.2.9
2 vendors · 2 products