CVE-2026-75134 SEOWriting WordPress Plugin 1.12.5 Stored XSS via iframe onload
Authenticated contributors can inject malicious JavaScript via iframe onload attributes, leading to code execution and privilege escalation when viewed by higher-privileged users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-75134?
CVE-2026-75134 is a medium-severity cross-site scripting vulnerability in SEOWriting, published on 2 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
SEOWriting plugin for WordPress through 1.12.5 contains a stored cross-site scripting vulnerability that allows authenticated contributors to inject malicious JavaScript by exploiting an overly permissive KSES allowlist that explicitly permits the onload event handler on iframe elements. Attackers can store crafted JavaScript payloads in post content that execute when the affected post is viewed or previewed by higher-privileged users, potentially leading to privilege escalation or account compromise.
Weakness: CWE-79
Which versions are affected by CVE-2026-75134?
How do I fix CVE-2026-75134?
No fix has been published for CVE-2026-75134 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-2026-75134 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-75134 exists.
Sources
Also known as GHSA-74xq-2f66-pchm.