CVE-2026-97283 Liquid Web / StellarWP Advanced Post Manager - Insecure Deserialization

Liquid Web / StellarWP Advanced Post Manager <= 4.5.5 contains an insecure deserialization vulnerability caused by untrusted data deserialization, letting attackers perform object injection remotely, exploit requires crafted input.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.36% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Insecure Deserialization
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
5 October 2026
Updated
15 October 2026
Weakness
CWE-502

Vendor fix

Update to the latest version beyond 4.5.5.

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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