UpHeron
All vulnerabilities

Servers and applications

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. This attack appear to be exploitable via Subscribe to a forum through IDOR. This vulnerability appears to have been fixed in 1.8.15.

Severity
Medium 4.3
Published
26 Jun 2018
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
1.8.15
Exploit chance
0.6% in the next 30 daysHigher than 49% of CVEs. EPSS by FIRST, 10 Nov 2026
Weakness
Improper privilege management (CWE-269)
Attack
Over the network · Needs a user account · No user action needed
Attacker can
Read some data
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Sources
NVD

Affected software

SoftwareAffected versions
MyBBServers and applications · cpe:a:mybb:mybb
  • Every version before 1.8.15

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-1000503
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-1000503