● Medium · CVSS 6.5

How to Fix CVE-2026-1674: Missing authorization in Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder

Q: What is the CVSS score for CVE-2026-1674?

6.5 (Medium). Vector: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`.

Q: Where is the official advisory for CVE-2026-1674?

The vendor advisory is at [https://www.wordfence.com/threat-intel/vulnerabilities/id/4bc10693-6d7c-4293-8848-02181ceb0d25?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/4bc10693-6d7c-4293-8848-02181ceb0d25?source=cve). The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-1674.

By Sai Kiran Pandrala. Last verified: 2026-05-25.

CVE-2026-1674 is a missing authorization in saadiqbal Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder. The fix is to apply the vendor patch noted below.

⚡ At a glance


Severity	6.5 (Medium)
Actively exploited?	No public listing in CISA KEV
Affected	Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder 0 to <=1.6.0
Fixed in	See vendor advisory
Type (CWE)	CWE-862 Missing Authorization

What is CVE-2026-1674?

The Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder plugin for WordPress is vulnerable to unauthorized modification of data due to missing authorization within the save_gutena_forms_schema() function in all versions up to, and including, 1.6.0. This makes it possible for authenticated attackers, with Contributor-level access and above, to update option values to a structured array value on the WordPress site. This can be use to update an option that would create an error on the site and deny service to legitimate users or be used to set some values, that would, for example enable site user registration when it is explicitly disabled. The CVSS base score is 6.5 (Medium). The official advisory is at https://www.wordfence.com/threat-intel/vulnerabilities/id/4bc10693-6d7c-4293-8848-02181ceb0d25?source=cve.

Am I affected?

Check the version of Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder you are running and compare it against the Affected row above (Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder 0 to <=1.6.0). If your build sits inside the affected range, you must patch.

Run the version check that fits your platform:


# Linux package check
dpkg -s gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder 2>/dev/null | grep -i ^Version
rpm -q gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder 2>/dev/null
command -v gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder >/dev/null && gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder --version 2>/dev/null


# Windows (PowerShell)
Get-Package -Name "*Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder*" -ErrorAction SilentlyContinue | Select-Object Name, Version
winget list --name "Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder" 2>$null

How to fix CVE-2026-1674

Upgrade Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder to a patched build: See vendor advisory. The vendor advisory is the source of truth for the exact fixed version.

Ubuntu / Debian


sudo apt-get update
sudo apt-get install --only-upgrade gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder
dpkg -s gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder | grep -i ^Version

RHEL / CentOS / Rocky / AlmaLinux


sudo dnf upgrade --refresh gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder -y
# or for older releases:
sudo yum update gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder -y
rpm -q gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder

SUSE / openSUSE


sudo zypper refresh
sudo zypper update gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder
rpm -q gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder

PHP / Composer


composer update saadiqbal/gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder 2>/dev/null || composer update
composer show | head -20

WordPress


# Update via WP-CLI
wp plugin update --all
wp core update

Complete PowerShell remediation script (Windows)


# Fix script for CVE-2026-1674 affecting Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder
# Run as administrator. Detect -> backup -> upgrade -> verify -> log.

$ErrorActionPreference = "Stop"
$LogPath  = "C:\Logs\CVE-2026-1674-fix-$(Get-Date -Format yyyyMMdd-HHmmss).log"
New-Item -ItemType Directory -Force (Split-Path $LogPath) | Out-Null
Start-Transcript -Path $LogPath -Append

try {
    Write-Host "[1/4] Detect installed version"
    $pkg = Get-Package -Name "*Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder*" -ErrorAction SilentlyContinue
    if ($pkg) { $pkg | Format-Table Name, Version }
    else { Write-Host "Not detected via Get-Package; try winget list" }

    Write-Host "[2/4] Backup configuration"
    $backup = "C:\Backup\gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder-$(Get-Date -Format yyyyMMdd)"
    New-Item -ItemType Directory -Force $backup | Out-Null
    Get-ChildItem "C:\ProgramData\Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder" -ErrorAction SilentlyContinue |
        Copy-Item -Destination $backup -Recurse -Force -ErrorAction SilentlyContinue

    Write-Host "[3/4] Apply the upgrade to See vendor advisory"
    winget upgrade --name "Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder" --silent --accept-source-agreements --accept-package-agreements
    if ($LASTEXITCODE -ne 0) {
        # Fallback: pull latest via OS update channel
        Install-Module -Name PSWindowsUpdate -Force -SkipPublisherCheck -ErrorAction SilentlyContinue
        Import-Module PSWindowsUpdate
        Install-WindowsUpdate -MicrosoftUpdate -AcceptAll -IgnoreReboot
    }

    Write-Host "[4/4] Verify the patched build"
    winget list --name "Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder"
    Write-Host "Patch applied. Reboot if prompted."
    exit 0
} catch {
    Write-Error "Patch failed: $_"
    exit 1
} finally {
    Stop-Transcript
}

Complete Bash remediation script (Linux)


#!/usr/bin/env bash
# Fix script for CVE-2026-1674 affecting Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder
# Detect -> backup -> upgrade -> verify -> log.

set -euo pipefail
LOG="/var/log/cve-2026-1674-fix-$(date +%Y%m%d-%H%M%S).log"
exec > >(tee -a "$LOG") 2>&1

echo "[1/4] Detect installed version"
if command -v dpkg >/dev/null; then
    dpkg -s gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder 2>/dev/null | grep -i ^Version || echo "gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder not installed via dpkg"
elif command -v rpm >/dev/null; then
    rpm -q gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder || echo "gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder not installed via rpm"
fi

echo "[2/4] Backup configuration"
BACKUP="/root/backup-cve-2026-1674-$(date +%Y%m%d)"
mkdir -p "$BACKUP"
for d in /etc/gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder /etc/gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder.d /etc/gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder.conf; do
    [ -e "$d" ] && cp -a "$d" "$BACKUP/" || true
done

echo "[3/4] Apply the upgrade (target: See vendor advisory)"
if command -v apt-get >/dev/null; then
    apt-get update
    apt-get install --only-upgrade -y gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder
elif command -v dnf >/dev/null; then
    dnf upgrade --refresh -y gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder
elif command -v yum >/dev/null; then
    yum update -y gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder
elif command -v zypper >/dev/null; then
    zypper --non-interactive update gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder
fi

echo "[4/4] Verify the patched build"
if command -v dpkg >/dev/null; then
    dpkg -s gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder 2>/dev/null | grep -i ^Version
elif command -v rpm >/dev/null; then
    rpm -q gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder
fi
echo "Done. Restart any service that loaded the old library."

If you can't patch immediately

Apply at least one of the following inline controls until you can deploy the patched build. None replace the upgrade.

Restrict exposure with nftables (Linux)


# Allow only trusted CIDR to reach the affected service ports
sudo nft add table inet filter 2>/dev/null || true
sudo nft 'add chain inet filter input { type filter hook input priority 0 ; }' 2>/dev/null || true
sudo nft 'add rule inet filter input tcp dport {80, 443} ip saddr != 10.0.0.0/8 drop'
sudo nft list ruleset

Block at the host firewall (Windows)


New-NetFirewallRule -DisplayName "Block-CVE-2026-1674" -Direction Inbound -Action Block -Protocol TCP -LocalPort 80,443 -RemoteAddress Any -Enabled True
Get-NetFirewallRule -DisplayName "Block-CVE-2026-1674"

Disable the affected service (Linux)


sudo systemctl stop gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder 2>/dev/null || true
sudo systemctl disable gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder 2>/dev/null || true

If the vendor advisory lists an official workaround, prefer that wording verbatim. If no workaround is published, the only safe remediation is the patch.

How to verify the fix worked

After upgrading, confirm the installed version matches the patched build and that no old library is still loaded by a long-running process.


# Linux
dpkg -s gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder 2>/dev/null | grep -i ^Version
rpm -q gutena-forms-contact-form-survey-form-feedback-form-booking-form-and-custom-form-builder 2>/dev/null || true
# Pid map check for old library handles
sudo lsof +c0 2>/dev/null | grep -i "DEL.*lib" || true


# Windows
Get-Package -Name "*Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder*" | Select-Object Name, Version
Get-HotFix | Sort-Object InstalledOn -Descending | Select-Object -First 5

Expected: the reported version is at or above See vendor advisory. Restart the affected service (systemctl restart <service> on Linux, or restart the Windows service) so it loads the patched binary.

Frequently asked questions

Other vulnerabilities in the same area that are worth patching alongside this one:

How to Fix CVE-2026-8434: Cross-Site Request Forgery in Concrete CMS — Cross-Site Request Forgery in Concrete CMS
How to Fix CVE-2026-24135: Path Traversal in gogs — Path Traversal in gogs
How to Fix CVE-2026-26062: Input Validation Flaw in fleet , Input Validation Flaw in fleet
How to Fix CVE-2026-32431: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') , Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
How to Fix CVE-2026-3224: Authentication bypass in Server , Authentication bypass in Server

Is CVE-2026-1674 actively exploited?

There is no public confirmation of exploitation in the wild listed in CISA KEV at the time of this writing. Patch anyway. Public exploits commonly follow disclosure within weeks.

Do I need to reboot after patching CVE-2026-1674?

For kernel and OS-level updates, yes. For most userland packages a systemctl restart <service> is enough on Linux, and restarting the Windows service or app on Windows. Any process that loaded the old library keeps using it until restarted.

What is the CVSS score for CVE-2026-1674?

6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Where is the official advisory for CVE-2026-1674?

The vendor advisory is at https://www.wordfence.com/threat-intel/vulnerabilities/id/4bc10693-6d7c-4293-8848-02181ceb0d25?source=cve. The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-1674.

References

Official vendor advisory: https://www.wordfence.com/threat-intel/vulnerabilities/id/4bc10693-6d7c-4293-8848-02181ceb0d25?source=cve
NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1674
CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Additional reference: https://plugins.trac.wordpress.org/changeset/3463148/gutena-forms

*Written by Sai Kiran Pandrala. Assembled from the official vendor advisory, NVD record, and CISA KEV listing on 2026-05-25. Always confirm against the vendor's advisory before applying changes in production.*