What is CVE-2026-1877?

CVE-2026-1877 is a medium-severity vulnerability in Johnh10 Auto Post Scheduler, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-31.

How severe is CVE-2026-1877?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Johnh10 Auto Post Scheduler

CVE-2026-1877

The Auto Post Scheduler plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.84. This is due to missing nonce validation on the 'aps_options_page' function. This makes it possible for unauthenticated attackers to update settings and inject malicious web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (10.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Johnh10 Auto Post Scheduler — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-1877?: CVE-2026-1877 is a medium-severity vulnerability in Johnh10 Auto Post Scheduler, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-31.
How severe is CVE-2026-1877?: Medium severity. CVSS v3 base score is 6.1 out of 10.