Auth bypass in Miniorange Jwt Authentication For Wp Rest Apis
CVE-2026-89027
miniOrange JWT Authentication for WP REST APIs plugin for WordPress before 4.8.0 contains an authentication method downgrade vulnerability that allows unauthenticated attackers to bypass administrator-configured authentication by supplying a specific GET parameter without any capability check or nonce verification. Attackers can force the plugin to use Basic HTTP authentication regardless of configured JWT or API token settings, then exploit distinguishable error codes and the absence of rate limiting to perform unthrottled username enumeration and credential guessing attacks.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- wordpress.org/plugins/wp-rest-api-authentication/ (release-notes)
- www.vulncheck.com/advisories/miniorange-jwt-authentication-for-wp-rest-apis-aut… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-89027?
- CVE-2026-89027 is a medium-severity vulnerability in Miniorange Jwt Authentication For Wp Rest Apis, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-09-15.
- How severe is CVE-2026-89027?
- Medium severity. CVSS v3 base score is 6.5 out of 10.