PHP Object Injection RCE in WordPress Admin Columns plugin
CVE-2026-7654 is a PHP Object Injection vulnerability in the Admin Columns plugin for WordPress affecting versions up to and including 7.0.18. The flaw is caused by unsafe use of unserialize() without an allowed_classes restriction in the IdsToCollection::get_ids_from_string() function. That function processes attacker-controlled post meta values without sufficient validation, allowing a malicious authenticated user to supply a crafted serialized object in a post custom meta field. Because the plugin includes a usable POP gadget chain, successful deserialization can be turned into arbitrary code execution, resulting in remote code execution in the context of the web server user.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
allowed_classes restrictions and validating/sanitizing attacker-controlled post meta values before processing. Apply the vendor-provided patch or updated release as soon as possible.Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.