CVE-2026-89288 Fast Courier 5.0.0 - 5.2.3 - Unauthenticated SQLi via 'wp_order_id' Parameter
Unauthenticated attackers can perform SQL injection via the wp_order_id parameter to read arbitrary database data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-89288?
CVE-2026-89288 is a high-severity SQL injection vulnerability in Unknown Fast Courier, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Fast Courier WordPress plugin before 5.2.4 does not sanitize and escape a value before using it in a SQL query on an unauthenticated REST route, allowing unauthenticated attackers to perform SQL injection and read arbitrary data from the database.
Weakness: CWE-89
Which versions are affected by CVE-2026-89288?
How do I fix CVE-2026-89288?
No fix has been published for CVE-2026-89288 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-89288 being exploited?
There is no known exploitation of CVE-2026-89288 in the wild and no public exploit code.
Sources
Also known as GHSA-v47c-mj7g-mcvr.