Vulnerability details

CVE-2026-88903

Topcontent

Topcontent <= 1.2.1 - Unauthenticated Stored XSS via Content Webhook

CVSS 3.1

8.8High

Official description

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.

CVSS scores

Score	Version	Source	Vector
8.8High	3.1	CISA ADP / Vulnrichment (CISA-ADP)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
—	Topcontent	v ≤ 1.2.1	CVEProject cvelistV5 (CNA)

References and advisories

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

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Details

Published: 2026-10-11
Last updated: 2026-10-11
State: Published
Assigner (CNA): WPScan

Exploit prediction (EPSS)

0.27%

Probability of exploitation in 30 days

20%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')