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CVE-2026-15962— Fluent Forms Pro Add On Pack <= 6.2.6 - Authenticated (Subscriber+) PHP Object Injection to Arbitrary User Password Change via User Meta Field

Quick assessment

Affected
techjewel Fluent Forms Pro Add On Pack
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fluent Forms Fluent Forms Pro Add On Pack是Fluent Forms公司的一款表单插件扩展包。 Fluent Forms Pro Add On Pack 6.2.6及之前版本存在反序列化注入漏洞，该漏洞源于反序列化不受信任的输入，可能导致认证攻击者注入PHP对象并利用POP链更改用户密码和接管管理员账户。

CVSS 8.8 · High EPSS 0.38% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
techjewel Fluent Forms Pro Add On Pack ≤ 6.2.6 affected
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I. Basic Information for CVE-2026-15962

Vulnerability Information
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Vulnerability Title
Fluent Forms Pro Add On Pack <= 6.2.6 - Authenticated (Subscriber+) PHP Object Injection to Arbitrary User Password Change via User Meta Field
Source: CVE Program / CVE List V5
Vulnerability Description
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Fluent Forms Pro Add On Pack 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fluent Forms Fluent Forms Pro Add On Pack是Fluent Forms公司的一款表单插件扩展包。 Fluent Forms Pro Add On Pack 6.2.6及之前版本存在反序列化注入漏洞，该漏洞源于反序列化不受信任的输入，可能导致认证攻击者注入PHP对象并利用POP链更改用户密码和接管管理员账户。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
techjewel Fluent Forms Pro Add On Pack 0 ~ 6.2.6 -

II. Public POCs for CVE-2026-15962

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III. Intelligence Information for CVE-2026-15962

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Vendor Advisories for CVE-2026-15962 (1)

Vendor Pages for CVE-2026-15962 (1)

IV. Related Vulnerabilities

Same product: Fluent Forms Pro Add On Pack
Same vendor: techjewel
Same weakness: CWE-502

V. Comments for CVE-2026-15962

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