# PHPMailer vulnerabilities

Source: https://junglewise.ai/threats/technologies/phpmailer  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/phpmailer.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in PHPMailer: 0 in the last 7 days and 0 in the last 90 days, 2 of them critical and 1 exploited in the wild. The most recent, CVE-2020-36326, was published on 4 May 2021.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 3 (2 critical, 1 exploited in the wild)

## About PHPMailer

PHP library for sending email messages with support for SMTP, PHP mail(), and sendmail.

## Latest PHPMailer vulnerabilities

- [CVE-2020-36326: PHPMailer object injection in attachment processing](https://junglewise.ai/threats/cve-2020-36326-phpmailer-object-injection-in-attachment-processing) (critical, CVSS 9.8, published 4 May 2021)
- [CVE-2016-10033: Remote code execution in PHPMailer](https://junglewise.ai/threats/cve-2016-10033-phpmailer-command-injection-in-mailsend-function) (critical, exploited in the wild, CVSS 3.1, published 5 Mar 2020)
- [CVE-2017-5223: PHPMailer local file disclosure in msgHTML method](https://junglewise.ai/threats/cve-2017-5223-phpmailer-local-file-disclosure-in-msghtml-method) (medium, CVSS 5.5, published 16 Jan 2017)

## Most severe PHPMailer vulnerabilities

- [CVE-2016-10033: Remote code execution in PHPMailer](https://junglewise.ai/threats/cve-2016-10033-phpmailer-command-injection-in-mailsend-function) (critical, exploited in the wild, CVSS 3.1, published 5 Mar 2020)
- [CVE-2020-36326: PHPMailer object injection in attachment processing](https://junglewise.ai/threats/cve-2020-36326-phpmailer-object-injection-in-attachment-processing) (critical, CVSS 9.8, published 4 May 2021)
- [CVE-2017-5223: PHPMailer local file disclosure in msgHTML method](https://junglewise.ai/threats/cve-2017-5223-phpmailer-local-file-disclosure-in-msghtml-method) (medium, CVSS 5.5, published 16 Jan 2017)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other PHP technologies

- [Php](https://junglewise.ai/threats/technologies/php-php): 12 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "PHPMailer vulnerabilities", https://junglewise.ai/threats/technologies/phpmailer, 9 November 2026.