CVE-2026-87963 Yo 1.1 - 1.3.1 - Unauthenticated SQL Injection via username Parameter
Unauthenticated attackers can inject SQL via the username parameter to read arbitrary database contents, including administrator password hashes.
- 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-2026-87963?
CVE-2026-87963 is a high-severity SQL injection vulnerability in Unknown Yo, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Yo WordPress plugin from 1.1 through 1.3.1 does not sanitize or parameterize the username request parameter before using it in a SQL query, and reads it before WordPress applies its request escaping, allowing unauthenticated attackers to perform SQL injection and read arbitrary database contents including administrator password hashes.
Weakness: CWE-89
Which versions are affected by CVE-2026-87963?
How do I fix CVE-2026-87963?
No fix has been published for CVE-2026-87963 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-2026-87963 being exploited?
There is no known exploitation of CVE-2026-87963 in the wild and no public exploit code.
Sources
Also known as GHSA-vfmj-6hfh-5m4v.