WordPress
WebUsage: unknown. No public source measures this product yet.
Version split: unknown. No public source for this product.
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 \" (...
Exploited in the wild. In CISA KEV since 2025‑07‑07. Fixed in 5.2.18.
What to do
Find your product and version, then upgrade to the build on the right.
- Packagist phpmailer/phpmailerAffected: ≥ 5.0.0, < 5.2.18Upgrade to: 5.2.18Stated by: GitHub advisory
- Phpmailer Project PhpmailerAffected: < 5.2.18Upgrade to: 5.2.18Stated by: NVD
- WordpressAffected: ≤ 4.7Upgrade to: after 4.7Stated by: NVD
- Joomla\!Affected: ≥ 1.5.0, ≤ 3.6.5Upgrade to: after 3.6.5Stated by: NVD
- Сообщество свободного программного обеспечения PHPMailerAffected: до 5.2.18Upgrade to: not statedStated by: BDU
Versions as the sources state them. 1 more product has version data. Full version matrix after sign-in
Coverage timeline
0 publishersAdded to CISA KEV catalog
Sourced from public security reporting — each date is when it was published, not when it happened.
What it is
From the CVE record
Remote code execution in PHPMailer
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
EPSS99th
Public exploit
CISA KEV
- CISA KEV
Listed as exploited in the wild since 2025-07-07.
US federal agencies must remediate by 2025-07-28.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- Public exploits
24 sources with a proof of concept or module.
Exploit links, PoCs and Metasploit modules after sign-in- EPSS
100% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
A public exploit existed 46 days before the patch.
- OpenVAS check added
- Patch availablerecord updated
- Metasploit modulesource: metasploitpublic exploit / poc, nuclei check added
- Added to CISA KEV
- Publishedweakness classified, att&ck mapped
Affected products
And 1 more affected product. See all after sign-in
Scale
How widely the affected products are used. This is not a count of vulnerable hosts.
Estimate Public sources, each figure dated. How much of it is already patched is not known.
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Scored 9.8 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- github.com/PHPMailer/PHPMailer/security/advisories/GHSA-5f37-gxvh-23v6
- nvd.nist.gov/vuln/detail/CVE-2016-10033
- exploit-db.com/exploits/42221
And 37 more references. See all after sign-in
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