CVE-2026-123044 ContentPen < 1.1.1 - Unauthenticated Stored XSS via API Key Disclosure
Unauthenticated users can use the exposed ContentPen REST API key to create posts with JavaScript that runs for any visitor, including administrators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Harmful if only installed
- Yes
- Needs a specific call
- No
- Fix
- None listed
What is CVE-2026-123044?
CVE-2026-123044 is a high-severity hardcoded credentials vulnerability in Unknown ContentPen, published on 12 Nov 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The ContentPen WordPress plugin before 1.1.1 discloses its REST API key to unauthenticated users, who can then use it to create posts containing unfiltered JavaScript, leading to Stored XSS that executes in the browser of any visitor, including administrators.
Weakness: CWE-79
Which versions are affected by CVE-2026-123044?
Having an affected version installed is enough. The problem is in what it ships or how it installs, so no code has to call it.
How do I fix CVE-2026-123044?
No fix has been published for CVE-2026-123044 yet. Limit exposure of the affected software until one is available.
Upgrade, then change or revoke the exposed credential wherever it is used. More about Hardcoded credentials.
Is CVE-2026-123044 being exploited?
There is no known exploitation of CVE-2026-123044 in the wild and no public exploit code.
Sources
Also known as GHSA-v973-hgc6-wrfw.