CVE-2025-9083: The Ninja Forms WordPress plugin before 3.11.1 unserializes user input via form field, which could allow Unau

Q: How do I fix CVE-2025-9083?

ninja forms: upgrade to 3.11.1. Exact commands for each OS are on this page.

Q: Is CVE-2025-9083 being exploited?

CVE-2025-9083 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-9083 affect?

CVE-2025-9083 affects ninja forms. Severity is critical (CVSS 9.8). The Ninja Forms WordPress plugin before 3.11.1 unserializes user input via form field, which could allow Unauthenticated users to perform PHP Object Injection when a suitable gadget is present on the blog.

Q: How urgent is CVE-2025-9083?

Priority 59/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2025-9083 is a critical-severity flaw (CVSS 9.8) affecting ninja forms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Ninja Forms WordPress plugin before 3.11.1 unserializes user input via form field, which could allow Unauthenticated users to perform PHP Object Injection when a suitable gadget is present on the blog.

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-502
Published	2025-09-18
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: ninjaforms

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-18 06:15 UTCPublished CVE record published
2026-06-17 10:08 UTCUpdated Record last modified

ninjaforms ninja forms UPGRADE

Affected: < 3.11.1

Fixed in: 3.11.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ninja-forms || rpm -q ninja-forms || ninja-forms --version

2. UPGRADE to 3.11.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ninja-forms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ninja-forms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · pipx · FIXED · 1.18.9-1.fc46 · FEDORA-2026-95305954ab · source

sudo dnf upgrade --advisory=FEDORA-2026-95305954ab

Fedora ELN · libisds · FIXED · 0.11.2-19.eln159 · FEDORA-2026-bf61b68668 · source

sudo dnf upgrade --advisory=FEDORA-2026-bf61b68668

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: wpscan.com/vulnerability/60b4d7fc-5d23-4dcf-bd7f-e202cabc2625/

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-9083?

ninja forms: upgrade to 3.11.1. Exact commands for each OS are on this page.

Is CVE-2025-9083 being exploited?

CVE-2025-9083 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-9083 affect?

CVE-2025-9083 affects ninja forms. Severity is critical (CVSS 9.8). The Ninja Forms WordPress plugin before 3.11.1 unserializes user input via form field, which could allow Unauthenticated users to perform PHP Object Injection when a suitable gadget is present on the blog.

How urgent is CVE-2025-9083?

Priority 59/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities · PHP vulnerabilities

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References

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