CVE-2026-88903 Topcontent WordPress plugin - Stored XSS

Topcontent WordPress plugin through 1.2.1 contains a stored XSS caused by improper authorization and disabled HTML sanitisation in a request handler, letting unauthenticated attackers publish malicious JavaScript posts, exploit requires no API key configuration.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.28% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
11 October 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to the latest version of the Topcontent WordPress plugin.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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