CVE-2023-4284: Post Timeline < 2.2.6 - Reflected XSS

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-09-04 · updated 2026-06-17

Description

The Post Timeline WordPress plugin before 2.2.6 does not sanitise and escape an invalid nonce before outputting it back in an AJAX response, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin

Affected products

Post Timeline: before 2.2.6 — fixed in 2.2.6

How to fix

Upgrade to a fixed version: Post Timeline 2.2.6. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/1c126869-0afa-456f-94cc-10334964e5f9
https://wpscan.com/vulnerability/1c126869-0afa-456f-94cc-10334964e5f9
https://wpscan.com/vulnerability/1c126869-0afa-456f-94cc-10334964e5f9

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