CVE-2026-87741 ConvertPlus WordPress Plugin - Insecure Deserialization

ConvertPlus WordPress plugin <= 3.6.3 contains a deserialization of untrusted data vulnerability caused by improper nonce and capability checks in cp_display_preview_modal AJAX action, letting authenticated attackers with Subscriber-level access inject PHP objects, exploit requires presence of a POP chain in other plugins or themes.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.40% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Insecure Deserialization
Impact
Remote Code Execution, Information Disclosure, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
28 September 2026
Updated
15 October 2026
Weakness
CWE-78

Vendor fix

Update to the latest version beyond 3.6.3 or apply vendor patches addressing nonce and capability checks.

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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