Unsafe Deserialization in Fluent Forms Pro Add On Pack (WordPress plugin) (CVE-2026-15962)
Summary
Vulnerability in Fluent Forms Pro Add On Pack (WordPress plugin) (CVE-2026-15962). Successful exploitation can lead to full system takeover.
Original description
The description as published by the source.
The Fluent Forms Pro Add On Pack plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.2.6 via deserialization of untrusted input. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject a PHP Object. The additional presence of a POP chain allows attackers to change user passwords and potentially take over administrator accounts. Note: This can only be exploited if user update integration is enabled and a user meta field is mapped.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-15962 has been found in Fluent Forms Pro Add On Pack (WordPress plugin).
Successful exploitation can lead to full system takeover. CVSS score: 8.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Fluent Forms Pro Add On Pack (WordPress plugin) CVE-2026-15962" on the vendor's site.
CVE-2026-15962 (Fluent Forms Pro Add On Pack (WordPress plugin)) — CWE-502 / CVSS v3 8.8
Attack vector: remote (network-reachable) / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Unsafe deserialization (CWE-502) exists in Fluent Forms Pro Add On Pack (WordPress plugin).
Check the vendor advisory for the affected versions of Fluent Forms Pro Add On Pack (WordPress plugin).
Severity: High (CVSS 8.8/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Fluent Forms Pro Add On Pack (WordPress plugin) を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web security@wordfence.com
- web security@wordfence.com
- web nvd.nist.gov
- web github.com