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CVE-2015-8974

32
FAUCET Score

CVE-2015-8974 describes a critical SQL injection vulnerability within the Group Promotions module of the MyBB forum software (versions prior to 1.6.18 and 1.8.6) and MyBB Merge System (prior to 1.8.6). This flaw allows unauthenticated remote attackers to execute arbitrary SQL commands, potentially leading to full compromise of the affected system. With a CVSS score of 10.0, it represents a severe risk due to its network-based attack vector, low complexity, and complete impact on confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.8.5CPE matchmatch criteria
cpe:2.3:a:mybb:merge_system:*:*:*:*:*:*:*:*
<= 1.6.17CPE matchmatch criteria
cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*
1.8.0CPE matchmatch criteria
cpe:2.3:a:mybb:mybb:1.8.0:*:*:*:*:*:*:*
1.8.1CPE matchmatch criteria
cpe:2.3:a:mybb:mybb:1.8.1:*:*:*:*:*:*:*
1.8.2CPE matchmatch criteria
cpe:2.3:a:mybb:mybb:1.8.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

10.0CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.12%
Probability of exploitation in next 30 days
EPSS Percentile
79.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0212 is in the 69th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

blog.mybb.com / 2015/09/07/mybb-1-8-6-1-6-18-merge-system-1-8-6-release
Release NotesVendor Advisory
openwall.com / lists/oss-security/2016/11/10/8
Third Party Advisory
openwall.com / lists/oss-security/2016/11/18/1
Mailing ListThird Party Advisory
securityfocus.com / bid/94397
Third Party AdvisoryVDB Entry