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CVE

CVE-2022-39265

MyBB is a free and open source forum software. The _Mail Settings_ - Additional Parameters for PHP's mail() function mai

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.

HIGH · CVSS 7.2 EPSS 0.04712
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
▤

Affected Products & Versions

1
mybb< 1.8.31
⚠

Public Exploits & PoCs

1
pocgithub.com · settings.xml#L2331-L2338github.com
▣

Scoring & Timeline

7.2
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 Oct 2022 · 06:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/mybb/mybb/commit/0cd318136a10b029bb5c8a8f6dddf39d87519797PatchThird Party Advisory
https://github.com/mybb/mybb/security/advisories/GHSA-hxhm-rq9f-7xj7Third Party Advisory
https://mybb.com/versions/1.8.31/Release NotesVendor Advisory
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