CVE-2024-23335: Backups directory .htaccess deletion in. MyBB

Severity: medium (CVSS 4.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-01 · updated 2026-06-17
Weakness: CWE-20

Description

MyBB is a free and open source forum software. The backup management module of the Admin CP may accept `.htaccess` as the name of the backup file to be deleted, which may expose the stored backup files over HTTP on Apache servers. MyBB 1.8.38 resolves this issue. Users are advised to upgrade. There are no known workarounds for this vulnerability

Affected products

mybb: before 1.8.38 — fixed in 1.8.38

How to fix

Upgrade to a fixed version: mybb 1.8.38. Check the vendor advisory for mitigations.

References

https://github.com/mybb/mybb/commit/450259e501b94c9d483efb167cb2bf875605e111.patch
https://github.com/mybb/mybb/security/advisories/GHSA-94xr-g4ww-j47r
https://mybb.com/versions/1.8.38
https://github.com/mybb/mybb/commit/450259e501b94c9d483efb167cb2bf875605e111.patch
https://github.com/mybb/mybb/security/advisories/GHSA-94xr-g4ww-j47r
https://mybb.com/versions/1.8.38

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