CVE-2021-47824 iDailyDiary 4.30 - Denial of Service (PoC)
Attackers can crash the iDailyDiary application by pasting an excessively long string into the diary tab name field.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-47824?
CVE-2021-47824 is a medium-severity denial of service vulnerability in Splinterware iDailyDiary, published on 16 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
iDailyDiary 4.30 contains a denial of service vulnerability that allows attackers to crash the application by overflowing the preferences tab name field. Attackers can paste a 2,000,000 character buffer into the default diary tab name to trigger an application crash.
Weakness: CWE-1284
Which versions are affected by CVE-2021-47824?
How do I fix CVE-2021-47824?
No fix has been published for CVE-2021-47824 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-47824 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47824 exists.
Sources
Also known as GHSA-wg24-xc4c-3h5p.