All vulnerabilities
CVE-2026-88903

Topcontent <= 1.2.1 - Unauthenticated Stored XSS via Content Webhook

Unknown Topcontent
Open in ThreatlineRecord JSON
CVSS
8.8High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.28%Chance of exploitation activity in the next 30 days, higher than 18% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version yet
Published11 Oct 2026Updated 11 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version.

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.

Text from CVE List

Affected versions 1

  • Topcontentaffected: all versions through 1.2.1CVE List

References 1