CVE-2026-103482 Cross-site scripting in Noptin – Newsletter, New Post Notifications & Email Automation
Unauthenticated attackers can inject scripts via subscriber fields, leading to code execution or account takeover when privileged users view campaign previews.
- 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-2026-103482?
CVE-2026-103482 is a medium-severity cross-site scripting vulnerability in picocodes Noptin – Newsletter, New Post Notifications & Email Automation, published on 10 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Simple Newsletter Plugin – Noptin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'noptin_fields[<custom_field_merge_tag>] (e.g. first_name)' parameter in all versions up to, and including, 4.3.10 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The attack chain requires a published campaign post whose body contains a [[subscriber.*]] merge tag; the unauthenticated attacker first POSTs the entity-encoded payload to the public manage_preferences form (which issues its own nonce on the same page), then pivots execution by embedding their confirm_key in a campaign preview URL sent to a privileged user via social engineering.
Weakness: CWE-79
Which versions are affected by CVE-2026-103482?
How do I fix CVE-2026-103482?
No fix has been published for CVE-2026-103482 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-2026-103482 being exploited?
There is no known exploitation of CVE-2026-103482 in the wild and no public exploit code.
Sources
Also known as GHSA-fgpr-5vg8-8pv9.