CVE-2022-24734
In affected versions the Admin CP's Settings management module does not validate setting types correctly on insertion and update, making it possible to add settings of supported type `php` with PHP code, executed on on _Change Settings_ pages.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 77.8%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
Description
MyBB is a free and open source forum software. In affected versions the Admin CP's Settings management module does not validate setting types correctly on insertion and update, making it possible to add settings of supported type `php` with PHP code, executed on on _Change Settings_ pages. This results in a Remote Code Execution (RCE) vulnerability. The vulnerable module requires Admin CP access with the `Can manage settings?` permission. MyBB's Settings module, which allows administrators to add, edit, and delete non-default settings, stores setting data in an options code string ($options_code; mybb_settings.optionscode database column) that identifies the setting type and its options, separated by a new line character (\n). In MyBB 1.2.0, support for setting type php was added, for which the remaining part of the options code is PHP code executed on Change Settings pages (reserved for plugins and internal use). MyBB 1.8.30 resolves this issue. There are no known workarounds.
- CVSS 3.1
- 7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 77.83% probability · 100th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-94
- Affected
- mybb/mybb
- Source
- security-advisories@github.com
References
- http://packetstormsecurity.com/files/167082/MyBB-1.8.29-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/167333/MyBB-Admin-Control-Remote-Code-Execution.htmlExploit, Third Party Advisory
- https://github.com/mybb/mybb/commit/92012b9831b330714b9f9b4646a98784113489c1Patch, Third Party Advisory
- https://github.com/mybb/mybb/security/advisories/GHSA-876v-gwgh-w57fPatch, Third Party Advisory
- https://mybb.com/versions/1.8.30/Release Notes, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-22-503/Third Party Advisory, VDB Entry, Vendor Advisory
- http://packetstormsecurity.com/files/167082/MyBB-1.8.29-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/167333/MyBB-Admin-Control-Remote-Code-Execution.htmlExploit, Third Party Advisory
- https://github.com/mybb/mybb/commit/92012b9831b330714b9f9b4646a98784113489c1Patch, Third Party Advisory
- https://github.com/mybb/mybb/security/advisories/GHSA-876v-gwgh-w57fPatch, Third Party Advisory
- https://mybb.com/versions/1.8.30/Release Notes, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-22-503/Third Party Advisory, VDB Entry, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.