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Vulnerability record · CVE-2022-39265 · published 6 October 2022

CVE-2022-39265: Mybb injection vulnerability

Mybb · Mybb

MyBB is a free and open source forum software. The _Mail Settings_ → Additional Parameters for PHP's mail() function mail_parameters setting value, in connection with the configured mail program's options and behavior, may allow access to sensitive information and Remote Code Execution (RCE). The vulnerable module requires Admin CP access with the `_Can manage settings?_` permission and may depend on configured file permissions. MyBB 1.8.31 resolves this issue with the commit `0cd318136a`. Users are advised to upgrade. There are no known workarounds for this vulnerability.

7.2 CVSS 3.1 High EPSS 3.0% · top 12.7% CWE-74 · InjectionCWE-77 · Command injection
7.2CVSS 3.1 base score
3.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

MyBB is a free and open source forum software. The _Mail Settings_ → Additional Parameters for PHP's mail() function mail_parameters setting value, in connection with the configured mail program's options and behavior, may allow access to sensitive information and Remote Code Execution (RCE). The vulnerable module requires Admin CP access with the `_Can manage settings?_` permission and may depend on configured file permissions. MyBB 1.8.31 resolves this issue with the commit `0cd318136a`. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/mybb/mybb/blob/mybb_1830/install/resources/settings.xml#L2331-L2338 ExploitThird Party Advisory
https://github.com/mybb/mybb/commit/0cd318136a10b029bb5c8a8f6dddf39d87519797 PatchThird Party Advisory
https://github.com/mybb/mybb/security/advisories/GHSA-hxhm-rq9f-7xj7 Third Party Advisory
https://mybb.com/versions/1.8.31/ Release NotesVendor Advisory
https://github.com/mybb/mybb/blob/mybb_1830/install/resources/settings.xml#L2331-L2338 ExploitThird Party Advisory
https://github.com/mybb/mybb/commit/0cd318136a10b029bb5c8a8f6dddf39d87519797 PatchThird Party Advisory
https://github.com/mybb/mybb/security/advisories/GHSA-hxhm-rq9f-7xj7 Third Party Advisory
https://mybb.com/versions/1.8.31/ Release NotesVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2011-10018Mybb code injection vulnerabilitymyBB version 1.6.4 was distributed with an unauthorized backdoor embedded in the source code. The backdoor allowed remote attackers to execute arbitr…EPSS 2.9%10.0CVE-2015-8974Mybb merge system sql injection vulnerabilitySQL injection vulnerability in the Group Promotions module in the admin control panel in MyBB (aka MyBulletinBoard) before 1.6.18 and 1.8.x before 1.…EPSS 2.1%10.0CVE-2015-2786Mybb vulnerabilityUnspecified vulnerability in MyBB (aka MyBulletinBoard) before 1.8.4 has unknown attack vectors related to "Group join request notifications sent to …EPSS 1.4%10.0CVE-2011-5133Mybb vulnerabilityUnspecified vulnerability in MyBB before 1.6.5 has unknown impact and attack vectors, related to an "unparsed user avatar in the buddy list."EPSS 1.7%10.0CVE-2006-0218Mybb vulnerabilityMultiple unspecified vulnerabilities in MyBulletinBoard (MyBB) before 1.0.2 have unspecified impact and attack vectors, related to (1) admin/moderate…EPSS 1.2%9.8CVE-2020-22612Mybb code injection vulnerabilityInstaller RCE on settings file write in MyBB before 1.8.22.EPSS 0.73%9.8CVE-2017-16780Mybb cross-site request forgery vulnerabilityThe installer in MyBB before 1.8.13 allows remote attackers to execute arbitrary code by writing to the configuration file.EPSS 5.8%9.8CVE-2016-9416Mybb merge system sql injection vulnerabilitySQL injection vulnerability in the users data handler in MyBB (aka MyBulletinBoard) before 1.8.8 and MyBB Merge System before 1.8.8 allows remote att…EPSS 2.1%

Source: NIST National Vulnerability Database (record CVE-2022-39265), CISA KEV, FIRST EPSS (scores of 2026-10-16). This page is refreshed as NVD updates the record.