CVE-2026-15962Network attack vector

Subscriber-level account takeover via unsafe custom-meta deserialization

Published Jul 26, 2026 · Updated Jul 26, 2026

PHP object injection in Fluent Forms Pro Add-on 6.2.6 and earlier allows remote authenticated users to change arbitrary user passwords. The form-prefilling path deserializes untrusted custom user or post meta without rejecting crafted PHP objects. Subscriber-level access reaches the flaw only when the User Registration or Update integration is enabled and a user-meta field is mapped; a usable POP chain permits password replacement and administrator account takeover.

CVSS severity8.8
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP object injection in Fluent Forms Pro Add-on 6.2.6 and earlier allows remote authenticated users to change arbitrary user passwords. The form-prefilling path deserializes untrusted custom user or post meta without rejecting crafted PHP objects. Subscriber-level access reaches the flaw only when the User Registration or Update integration is enabled and a user-meta field is mapped; a usable POP chain permits password replacement and administrator account takeover.

The record

CVE
CVE-2026-15962
Published
Jul 26, 2026
Updated
Jul 26, 2026
Vendor
Mahmudul Hasan Arif
Product
Fluent Forms Pro Add-on
Classifications
CWE-502, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=6.2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mahmudul Hasan Arif · Fluent Forms Pro Add-onversion=0 <=6.2.6

Published CVSS scores

8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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