CVE-2018-1000503
MyBB Group MyBB contains a Incorrect Access Control vulnerability in Private forums that can result in Users can view posts from private forums without having the password.
Does this matter?
Lower severity and a low EPSS score (0.62%). Track it; it rarely justifies an emergency change on its own.
Description
MyBB Group MyBB contains a Incorrect Access Control vulnerability in Private forums that can result in Users can view posts from private forums without having the password. This attack appear to be exploitable via Subscribe to a forum through IDOR. This vulnerability appears to have been fixed in 1.8.15.
- CVSS 3.0
- 4.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.62% probability · 50th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-269
- Affected
- mybb/mybb
- Source
- cve@mitre.org
EPSS 0.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.batterystapl.es/2018/03/local-file-inclusion-and-reading.htmlThird Party Advisory
- https://blog.mybb.com/2018/03/15/mybb-1-8-15-released-security-maintenance-release/Vendor Advisory
- http://www.batterystapl.es/2018/03/local-file-inclusion-and-reading.htmlThird Party Advisory
- https://blog.mybb.com/2018/03/15/mybb-1-8-15-released-security-maintenance-release/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.