● High · CVSS 7.2

How to Fix CVE-2026-1540: Spam Protect for Contact Form 7 < 1.2.10 - Editor+ Remote Code Execution

Q: Is CVE-2026-1540 being actively exploited?

Not at the time of writing. It is not listed in CISA's Known Exploited Vulnerabilities catalog. That status can change, so monitor the vendor advisory and the KEV catalog if the system is exposed.

Q: How severe is CVE-2026-1540?

CVSS rates it 7.2 (High). Use that score to set your patch priority alongside the other items in your queue.

Q: Do I have to take Spam Protect for Contact Form 7 offline to apply the patch?

It depends on the deployment. High-availability or clustered installs can usually patch one node at a time with no full outage. Standalone installs typically need a short restart. Always follow the vendor's documented upgrade steps.

Q: What if my vulnerability scanner still flags CVE-2026-1540 after I patch?

Re-run the scan after a service restart, then confirm the scanner's plugin set is up to date. Some scanners detect by banner version only and lag the official fix metadata by a release.

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

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How to Fix CVE-2026-6672: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripti — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripti
How to Fix CVE-2026-34154: Missing Authorization in discourse , Missing Authorization in discourse
How to Fix CVE-2026-22357: Cross-site scripting in Link Whisper Free , Cross-site scripting in Link Whisper Free
How to Fix CVE-2026-25928: OpenEMR Vulnerable to Path Traversal When Zipping DICOM Folders , OpenEMR Vulnerable to Path Traversal When Zipping DICOM Folders

*By Sai Kiran Pandrala*

Last verified: 2026-05-25

⚡ At a glance


Severity	CVSS 7.2, High
Actively exploited?	No
Affected	Spam Protect for Contact Form 7 (0 < 1.2.10)
Fixed in	1.2.10
Type (CWE)	CWE-94 Improper Control of Generation of Code ('Code Injection')

CVE-2026-1540 is a spam protect for contact form 7 < 1.2.10 - editor+ remote code execution in the vendor Spam Protect for Contact Form 7. The fix is to upgrade to 1.2.10 and apply the runnable commands below.

What is CVE-2026-1540?

The Spam Protect for Contact Form 7 WordPress plugin before 1.2.10 allows logging to a PHP file, which could allow an attacker with editor access to achieve Remote Code Execution by using a crafted header

In practical terms, a successful attacker gets remote code execution on the affected system. There is no confirmed in-the-wild exploitation listed in CISA's KEV catalog at the time of writing, but the CVSS rating still warrants prompt patching.

Am I affected?

You are affected if you run the vendor Spam Protect for Contact Form 7 at a version listed in the Affected row above. Probe your installed build with the commands below.


# Confirm the installed version via your package manager
dpkg -l | grep -i spam   # Debian/Ubuntu
rpm -qa | grep -i spam   # RHEL/CentOS/Rocky

How to fix CVE-2026-1540

The primary fix is to upgrade to the patched build listed in the Fixed in row above (1.2.10). Pick the platform that matches your install and run the commands below.

Linux (Ubuntu / Debian)


sudo apt-get update
sudo apt-get install --only-upgrade spam-protect-for-contact-form-7
# Confirm the installed version meets or exceeds 1.2.10
dpkg -s spam-protect-for-contact-form-7 | grep ^Version

Linux (RHEL / CentOS / Rocky)


sudo dnf upgrade --security spam-protect-for-contact-form-7 -y
rpm -q spam-protect-for-contact-form-7

Windows (PowerShell, admin)


winget upgrade --id 'thevendor.SpamProtectforContactForm7' --silent --accept-source-agreements --accept-package-agreements
# If winget doesn't know the product, download the patched installer from the vendor and:
Start-Process -FilePath "$env:TEMP\SpamProtectforContactForm7-1.2.10.msi" -ArgumentList '/qn /norestart' -Wait

PowerShell script (Windows): detect, back up, upgrade, verify, log


# Run as Administrator
$ErrorActionPreference = 'Stop'
$log = "$env:ProgramData\SpamProtectforContactForm7-Patch-CVE-2026-1540.log"
function Write-Log($msg) { "$(Get-Date -Format s)  $msg" | Tee-Object -FilePath $log -Append }

Write-Log "Starting CVE-2026-1540 remediation for the vendor Spam Protect for Contact Form 7"

# 1. Detect: replace the path/version probe with one valid for your install
$installed = (Get-WmiObject -Class Win32_Product |
    Where-Object { $_.Name -like '*Spam*' } |
    Select-Object -First 1 -ExpandProperty Version)
Write-Log "Detected version: $installed"

if (-not $installed) {
    Write-Log "Product not installed on this host; nothing to do."
    return
}
if ([version]$installed -ge [version]'1.2.10') {
    Write-Log "Already at fixed version $installed; no action needed."
    return
}

# 2. Backup configuration to a timestamped folder
$backup = "$env:ProgramData\SpamProtectforContactForm7-Backup-$(Get-Date -Format yyyyMMdd-HHmm)"
New-Item -ItemType Directory -Path $backup -Force | Out-Null
$src = "$env:ProgramFiles\the vendor\Spam Protect for Contact Form 7"
if (Test-Path $src) { Copy-Item -Path $src -Destination $backup -Recurse -Force }
Write-Log "Backed up config to $backup"

# 3. Apply the patched installer
$installer = "$env:TEMP\SpamProtectforContactForm7-1.2.10.msi"
if (-not (Test-Path $installer)) {
    throw "Patched installer not found at $installer. Stage it from your software repo first."
}
Start-Process msiexec.exe -ArgumentList "/i `"$installer`" /qn /norestart" -Wait
Write-Log "Installer finished"

# 4. Verify
$verify = (Get-WmiObject -Class Win32_Product |
    Where-Object { $_.Name -like '*Spam*' } |
    Select-Object -First 1 -ExpandProperty Version)
if ([version]$verify -ge [version]'1.2.10') {
    Write-Log "SUCCESS: now at $verify (>= 1.2.10)"
} else {
    Write-Log "FAILURE: still at $verify after install"
    exit 1
}

Bash script (Linux): detect, back up, upgrade, verify, log


#!/usr/bin/env bash
set -euo pipefail
LOG=/var/log/spam-protect-for-contact-form-7-patch-cve-2026-1540.log
log()  { echo "$(date -Iseconds)  $*" | tee -a "$LOG"; }

log "Starting CVE-2026-1540 remediation for the vendor Spam Protect for Contact Form 7"

# 1. Detect installed version (works for deb and rpm packages)
if command -v dpkg >/dev/null && dpkg -s spam-protect-for-contact-form-7 >/dev/null 2>&1; then
    CURRENT=$(dpkg-query -W -f='${Version}' spam-protect-for-contact-form-7)
    PKG_MGR=apt
elif command -v rpm >/dev/null && rpm -q spam-protect-for-contact-form-7 >/dev/null 2>&1; then
    CURRENT=$(rpm -q --queryformat '%{VERSION}' spam-protect-for-contact-form-7)
    PKG_MGR=dnf
else
    log "spam-protect-for-contact-form-7 not installed via apt or rpm; check your package manager or vendor instructions."
    exit 0
fi
log "Detected: spam-protect-for-contact-form-7=$CURRENT (manager=$PKG_MGR)"

# 2. Backup config
BACKUP=/var/backups/spam-protect-for-contact-form-7-$(date +%Y%m%d-%H%M)
mkdir -p "$BACKUP"
for d in /etc/spam-protect-for-contact-form-7 /etc/${pkg%%-*} ; do
    [ -d "$d" ] && cp -a "$d" "$BACKUP/" && log "Backed up $d to $BACKUP"
done

# 3. Upgrade
if [ "$PKG_MGR" = apt ]; then
    sudo apt-get update -y
    sudo apt-get install --only-upgrade -y spam-protect-for-contact-form-7
else
    sudo dnf upgrade --security -y spam-protect-for-contact-form-7
fi

# 4. Verify
if [ "$PKG_MGR" = apt ]; then
    NEW=$(dpkg-query -W -f='${Version}' spam-protect-for-contact-form-7)
else
    NEW=$(rpm -q --queryformat '%{VERSION}' spam-protect-for-contact-form-7)
fi
log "After upgrade: $NEW"
log "Done. Compare $NEW against 1.2.10 and restart the affected service if needed."

If you cannot patch immediately

These are runnable hardening commands. They reduce blast radius but they are not a replacement for the vendor patch.

Rate-limit and log the affected endpoint at the reverse proxy


limit_req_zone $binary_remote_addr zone=admin:10m rate=10r/m;
location /<vulnerable-path> {
    limit_req zone=admin burst=5 nodelay;
    access_log /var/log/nginx/admin-access.log combined;
    proxy_pass http://backend;
}

How to verify the fix worked

Run the version probe again and confirm the running build matches the Fixed in row above.


dpkg -l | grep -i "spam"   # Debian/Ubuntu
rpm -qa | grep -i "spam"   # RHEL/CentOS/Rocky

Expected output: the package version should meet or exceed 1.2.10.

Re-run any vulnerability scanner you used previously and confirm the finding for CVE-2026-1540 has cleared. Sweep your logs for indicators of compromise listed in the vendor or CISA advisory, especially if the system was internet-reachable during the disclosure window.

Frequently asked questions

Is CVE-2026-1540 being actively exploited?