CVE-2026-80513 wpForo Forum WordPress plugin - Insecure Deserialization

wpForo Forum WordPress plugin < 3.1.6 contains an insecure deserialization vulnerability caused by unrestricted class instantiation during deserialization of user-supplied profile field values, letting authenticated users with Subscriber-level access inject PHP objects, potentially leading to remote code execution if a POP chain is present.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.31% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Insecure Deserialization
Impact
Remote Code Execution, File System Write, SQL Injection
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
24 September 2026
Updated
15 October 2026
Weakness
CWE-502

Vendor fix

Upgrade to version 3.1.6 or later.

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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