CVE-2026-1877 Auto Post Scheduler <= 1.84 - Cross-Site Request Forgery to Stored Cross-Site Scripting via aps_options_page
Unauthenticated attackers can trick administrators into updating settings and injecting malicious scripts via CSRF in the Auto Post Scheduler plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-1877?
CVE-2026-1877 is a medium-severity vulnerability in johnh10 Auto Post Scheduler, published on 31 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-1877?
How do I fix CVE-2026-1877?
No fix has been published for CVE-2026-1877 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-1877 being exploited?
There is no known exploitation of CVE-2026-1877 in the wild and no public exploit code.
Sources
Also known as GHSA-q5mx-w9gm-5h8v.