CVE-2020-36326
Critical
Description
PHPMailer 6.1.8 through 6.4.0 allows object injection through Phar Deserialization via addAttachment with a UNC pathname. NOTE: this is similar to CVE-2018-19296, but arose because 6.1.8 fixed a functionality problem in which UNC pathnames were always considered unreadable by PHPMailer, even in safe contexts. As an unintended side effect, this fix eliminated the code that blocked addAttachment exploitation.
SeverityCritical
CVSS9.8
Exploit probability88. percentile3.1%
Product
Phpmailer
PublishedApr 28, 2021
First seenApr 28, 2021
Weakness typeCWE-502Deserialization of untrusted data
How to fix
Update
- wordpress wordpress3.7.36, 3.8.36, 3.9.34, 4.0.33, 4.1.33, 4.2.30, 4.3.26, 4.4.25, 4.5.24, 4.6.21, 4.7.21, 4.8.17, 4.9.18, 5.0.13, 5.1.10, 5.2.11, 5.3.8, 5.4.6, 5.5.5, 5.6.4, 5.7.2 or later
- phpmailer/phpmailer6.4.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| phpmailer_project phpmailer | 6.1.8 ≤ v ≤ 6.4.0 | — |
| wordpress wordpress | 3.7 ≤ v < 3.7.36, 3.8 ≤ v < 3.8.36, 3.9 ≤ v < 3.9.34, 4.0 ≤ v < 4.0.33, 4.1 ≤ v < 4.1.33, 4.2 ≤ v < 4.2.30, 4.3 ≤ v < 4.3.26, 4.4 ≤ v < 4.4.25, 4.5 ≤ v < 4.5.24, 4.6 ≤ v < 4.6.21, 4.7 ≤ v < 4.7.21, 4.8 ≤ v < 4.8.17, 4.9 ≤ v < 4.9.18, 5.0 ≤ v < 5.0.13, 5.1 ≤ v < 5.1.10, 5.2 ≤ v < 5.2.11, 5.3 ≤ v < 5.3.8, 5.4 ≤ v < 5.4.6, 5.5 ≤ v < 5.5.5, 5.6 ≤ v < 5.6.4, 5.7 ≤ v < 5.7.2 | 3.7.36, 3.8.36, 3.9.34, 4.0.33, 4.1.33, 4.2.30, 4.3.26, 4.4.25, 4.5.24, 4.6.21, 4.7.21, 4.8.17, 4.9.18, 5.0.13, 5.1.10, 5.2.11, 5.3.8, 5.4.6, 5.5.5, 5.6.4, 5.7.2 |
| phpmailer/phpmailerPackagist | 6.1.8 ≤ v < 6.4.1 | 6.4.1 |
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