CVE-2026-88903

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.

Affected

Topcontent

CVSS v3.1 CNA

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.28% chance of exploitation in the next 30 days, 19th percentile

Published

2026-10-11

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/173b07dd-6404-49c0-9e01-90b5b68d1dec/

References

• CVE Record
• NVD entry