CVE-2026-1042 Cross-site scripting in WP Hello Bar
Administrators can inject arbitrary scripts via parameters, leading to stored XSS execution for other users.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1042?
CVE-2026-1042 is a medium-severity cross-site scripting vulnerability in norcross WP Hello Bar, published on 20 Jan 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The WP Hello Bar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'digit_one' and 'digit_two' parameters in all versions up to, and including, 1.02 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2026-1042?
How do I fix CVE-2026-1042?
No fix has been published for CVE-2026-1042 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-1042 being exploited?
There is no known exploitation of CVE-2026-1042 in the wild and no public exploit code.
Sources
Also known as GHSA-4hcf-mq88-ff2w.