CVE-2026-1900 Link Whisper Free < 0.9.1 - Unauthenticated Settings and User Meta Update
Unauthenticated attackers can modify plugin settings and user metadata via a public REST endpoint in the Link Whisper Free WordPress plugin.
- 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-2026-1900?
CVE-2026-1900 is a medium-severity missing authorization vulnerability in Unknown Link Whisper Free, published on 7 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Link Whisper Free WordPress plugin before 0.9.1 has a publicly accessible REST endpoint that allows unauthenticated settings updates.
Weakness: CWE-306
Which versions are affected by CVE-2026-1900?
It affects 1 product.
Products include Linkwhisper Link Whisper.
How do I fix CVE-2026-1900?
No fix has been published for CVE-2026-1900 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-1900 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1900 exists.
Sources
Also known as GHSA-9w5f-xhp2-5782.