CVE-2021-24210: PhastPress < 1.111 - Open Redirect

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-04-05 · updated 2026-06-17
Weakness: CWE-601

Description

There is an open redirect in the PhastPress WordPress plugin before 1.111 that allows an attacker to malform a request to a page with the plugin and then redirect the victim to a malicious page. There is also a support comment from another user one year ago (https://wordpress.org/support/topic/phast-php-used-for-remote-fetch/) that says that the php involved in the request only go to whitelisted pages but it's possible to redirect the victim to any domain.

Affected products

kiboit PhastPress: before 1.111 — fixed in 1.111

How to fix

Upgrade to a fixed version: kiboit PhastPress 1.111. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2021-24210 or the next vulnerability affects your stack