⚠ Reference material — not professional advice. Test in staging, back up first, verify against your specific version. Use your own judgment for your environment.
● Medium · CVSS 4.8

How to Fix CVE-2026-1787: Missing authorization in LearnPress – Backup & Migration Tool

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

CVE-2026-1787 is a missing authorization in thimpress LearnPress – Backup & Migration Tool. The fix is to apply the vendor patch noted below.

⚡ At a glance
Severity4.8 (Medium)
Actively exploited?No public listing in CISA KEV
AffectedLearnPress – Backup & Migration Tool 0 to <=4.1.0
Fixed inSee vendor advisory
Type (CWE)CWE-862 Missing Authorization

What is CVE-2026-1787?

The LearnPress Export Import – WordPress extension for LearnPress plugin for WordPress is vulnerable to unauthorized loss of data due to a missing capability check on the 'delete_migrated_data' function in all versions up to, and including, 4.1.0. This makes it possible for unauthenticated attackers to delete course that have been migrated from Tutor LMS. The Tutor LMS plugin must be installed and activated to exploit the vulnerability. The CVSS base score is 4.8 (Medium). The official advisory is at https://www.wordfence.com/threat-intel/vulnerabilities/id/7bde915d-092a-452b-a0e0-ce5c2ce203dc?source=cve.

Am I affected?

Check the version of LearnPress – Backup & Migration Tool you are running and compare it against the Affected row above (LearnPress – Backup & Migration Tool 0 to <=4.1.0). If your build sits inside the affected range, you must patch.

Run the version check that fits your platform:


# Linux package check
dpkg -s learnpress-backup-migration-tool 2>/dev/null | grep -i ^Version
rpm -q learnpress-backup-migration-tool 2>/dev/null
command -v learnpress-backup-migration-tool >/dev/null && learnpress-backup-migration-tool --version 2>/dev/null


# Windows (PowerShell)
Get-Package -Name "*LearnPress – Backup & Migration Tool*" -ErrorAction SilentlyContinue | Select-Object Name, Version
winget list --name "LearnPress – Backup & Migration Tool" 2>$null

How to fix CVE-2026-1787

Upgrade LearnPress – Backup & Migration Tool 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 learnpress-backup-migration-tool
dpkg -s learnpress-backup-migration-tool | grep -i ^Version

RHEL / CentOS / Rocky / AlmaLinux


sudo dnf upgrade --refresh learnpress-backup-migration-tool -y
# or for older releases:
sudo yum update learnpress-backup-migration-tool -y
rpm -q learnpress-backup-migration-tool

SUSE / openSUSE


sudo zypper refresh
sudo zypper update learnpress-backup-migration-tool
rpm -q learnpress-backup-migration-tool

PHP / Composer


composer update thimpress/learnpress-backup-migration-tool 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-2026-1787 affecting LearnPress – Backup & Migration Tool
# Run as administrator. Detect -> backup -> upgrade -> verify -> log.

$ErrorActionPreference = "Stop"
$LogPath  = "C:\Logs\CVE-2026-1787-fix-$(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"
    $pkg = Get-Package -Name "*LearnPress – Backup & Migration Tool*" -ErrorAction SilentlyContinue
    if ($pkg) { $pkg | Format-Table Name, Version }
    else { Write-Host "Not detected via Get-Package; try winget list" }

    Write-Host "[2/4] Backup configuration"
    $backup = "C:\Backup\learnpress-backup-migration-tool-$(Get-Date -Format yyyyMMdd)"
    New-Item -ItemType Directory -Force $backup | Out-Null
    Get-ChildItem "C:\ProgramData\LearnPress – Backup & Migration Tool" -ErrorAction SilentlyContinue |
        Copy-Item -Destination $backup -Recurse -Force -ErrorAction SilentlyContinue

    Write-Host "[3/4] Apply the upgrade to See vendor advisory"
    winget upgrade --name "LearnPress – Backup & Migration Tool" --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 "LearnPress – Backup & Migration Tool"
    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-2026-1787 affecting LearnPress – Backup & Migration Tool
# Detect -> backup -> upgrade -> verify -> log.

set -euo pipefail
LOG="/var/log/cve-2026-1787-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 learnpress-backup-migration-tool 2>/dev/null | grep -i ^Version || echo "learnpress-backup-migration-tool not installed via dpkg"
elif command -v rpm >/dev/null; then
    rpm -q learnpress-backup-migration-tool || echo "learnpress-backup-migration-tool not installed via rpm"
fi

echo "[2/4] Backup configuration"
BACKUP="/root/backup-cve-2026-1787-$(date +%Y%m%d)"
mkdir -p "$BACKUP"
for d in /etc/learnpress-backup-migration-tool /etc/learnpress-backup-migration-tool.d /etc/learnpress-backup-migration-tool.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 learnpress-backup-migration-tool
elif command -v dnf >/dev/null; then
    dnf upgrade --refresh -y learnpress-backup-migration-tool
elif command -v yum >/dev/null; then
    yum update -y learnpress-backup-migration-tool
elif command -v zypper >/dev/null; then
    zypper --non-interactive update learnpress-backup-migration-tool
fi

echo "[4/4] Verify the patched build"
if command -v dpkg >/dev/null; then
    dpkg -s learnpress-backup-migration-tool 2>/dev/null | grep -i ^Version
elif command -v rpm >/dev/null; then
    rpm -q learnpress-backup-migration-tool
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-2026-1787" -Direction Inbound -Action Block -Protocol TCP -LocalPort 80,443 -RemoteAddress Any -Enabled True
Get-NetFirewallRule -DisplayName "Block-CVE-2026-1787"

Disable the affected service (Linux)


sudo systemctl stop learnpress-backup-migration-tool 2>/dev/null || true
sudo systemctl disable learnpress-backup-migration-tool 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 learnpress-backup-migration-tool 2>/dev/null | grep -i ^Version
rpm -q learnpress-backup-migration-tool 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 "*LearnPress – Backup & Migration Tool*" | 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:

Is CVE-2026-1787 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-2026-1787?

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-2026-1787?

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

Where is the official advisory for CVE-2026-1787?

The vendor advisory is at https://www.wordfence.com/threat-intel/vulnerabilities/id/7bde915d-092a-452b-a0e0-ce5c2ce203dc?source=cve. The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-1787.

References

*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.*