CVE-2020-37005 TimeClock Software 1.01 Authenticated Time-Based SQL Injection
Authenticated attackers can enumerate valid usernames via time-based SQL injection in the notes parameter of add_entry.php.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-37005?
CVE-2020-37005 is a high-severity SQL injection vulnerability in TimeClock Software, published on 29 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
TimeClock Software 1.01 contains an authenticated time-based SQL injection vulnerability that allows attackers to enumerate valid usernames by manipulating the 'notes' parameter. Attackers can inject conditional time delays in the add_entry.php endpoint to determine user existence by measuring response time differences.
Weakness: CWE-89
Which versions are affected by CVE-2020-37005?
How do I fix CVE-2020-37005?
No fix has been published for CVE-2020-37005 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-2020-37005 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-37005 exists.
Sources
Also known as GHSA-hfq2-v7vg-r2m2.