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8.8
CVE-2026-88903: Topcontent plugin lets strangers add harmful scripts
CVE-2026-88903 · published 7 days ago
Summary
The Topcontent WordPress plugin does not verify who can send content and disables HTML safety checks, so anyone on the internet can create posts that contain malicious JavaScript. Those scripts run in the browsers of anyone who views the compromised pages, potentially stealing data or hijacking sessions. Install the latest plugin version or configure its API key to re‑enable proper authorization and content filtering.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| unknown | topcontent | <= 1.2.1 |
Original advisory text
Topcontent <= 1.2.1 - Unauthenticated Stored XSS via Content Webhook
The Topcontent WordPress plugin through 1.2.1 does not properly authorise one of its request handlers and disables HTML sanitisation before storing the submitted content, allowing unauthenticated attackers to publish arbitrary posts containing malicious JavaScript on any site where its API key has never been configured.
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker full control
Severity
8.8
High
Type
CWE-79Cross-site Scripting (XSS)
Timeline
Published11 Oct 2026
Updated15 Oct 2026
First seen11 Oct 2026
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