CVE-2016-10033
CRITICALCVSS 9.8/10Actively ExploitedEPSS 99.71%
Last modified
CVE-2016-10033 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The mailSend function in the isMail transport in PHPMailer before 5.2.18 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code via a \" (backslash double quote) in a crafted Sender property.. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.71% chance of exploitation in the next 30 days.
Description
The mailSend function in the isMail transport in PHPMailer before 5.2.18 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code via a \" (backslash double quote) in a crafted Sender property.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Phpmailer Project | Phpmailer | < 5.2.18 |
| Wordpress | Wordpress | <= 4.7 |
| Joomla | Joomla\! | >= 1.5.0, <= 3.6.5 |
References
- http://packetstormsecurity.com/files/140291/PHPMailer-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/140350/PHPMailer-Sendmail-Argument-Injection.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2016/Dec/78Mailing List, Patch, Third Party Advisory
- http://www.rapid7.com/db/modules/exploit/multi/http/phpmailer_arg_injectionExploit, Third Party Advisory
- http://www.securityfocus.com/archive/1/539963/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/95108Broken Link, Exploit, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037533Broken Link, Third Party Advisory, VDB Entry
- https://github.com/PHPMailer/PHPMailer/releases/tag/v5.2.18Patch, Vendor Advisory
- https://legalhackers.com/advisories/PHPMailer-Exploit-Remote-Code-Exec-CVE-2016-10033-Vuln.htmlExploit, Patch, Third Party Advisory
- https://www.drupal.org/psa-2016-004Third Party Advisory
- https://www.exploit-db.com/exploits/40968/Exploit, Patch, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/40969/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/40970/Exploit, Patch, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/40974/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/40986/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41962/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41996/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/42024/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/42221/Exploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/140291/PHPMailer-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/140350/PHPMailer-Sendmail-Argument-Injection.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2016/Dec/78Mailing List, Patch, Third Party Advisory
- http://www.rapid7.com/db/modules/exploit/multi/http/phpmailer_arg_injectionExploit, Third Party Advisory
- http://www.securityfocus.com/archive/1/539963/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/95108Broken Link, Exploit, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037533Broken Link, Third Party Advisory, VDB Entry
- https://github.com/PHPMailer/PHPMailer/releases/tag/v5.2.18Patch, Vendor Advisory
- https://legalhackers.com/advisories/PHPMailer-Exploit-Remote-Code-Exec-CVE-2016-10033-Vuln.htmlExploit, Patch, Third Party Advisory
- https://www.drupal.org/psa-2016-004Third Party Advisory
- https://www.exploit-db.com/exploits/40968/Exploit, Patch, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/40969/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/40970/Exploit, Patch, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/40974/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/40986/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41962/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41996/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/42024/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/42221/Exploit, Third Party Advisory, VDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-10033US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2016-10033?
The mailSend function in the isMail transport in PHPMailer before 5.2.18 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code via a \" (backslash double quote) in a crafted Sender property.
How severe is CVE-2016-10033?
CVE-2016-10033 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 99.71% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2016-10033?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2016-10033?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST