MyBB Group MyBB contains a File Inclusion vulnerability in Admin panel (Tools and Maintenance -> Task Manager -> Add New Task) that can resu
MyBB Group MyBB contains a File Inclusion vulnerability in Admin panel (Tools and Maintenance -> Task Manager -> Add New Task) that can result in Allows Local File Inclusion on modern PHP versions and Remote File Inclusion on ancient PHP versions. This attack appear to be exploitable via Must have access to admin panel. This vulnerability appears to have been fixed in 1.8.15.
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for help- Published
- Jun 26, 2018
- Updated
- Jun 16, 2026
- EPSS
- 1.3% · 69th percentile
- CWE
- CWE-829
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Report tools
Action score
28
Monitor
Low priority for now.
- CVSS
- 28 / 40 · 7.2 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.3%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| mybb | mybb | cpe:2.3:a:mybb:mybb |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- mybb mybbbefore 1.8.15
Same product
mybb: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-24734Remote code execution in mybb51Plan
- CVE-2018-17128A Persistent XSS issue was discovered in the Visual Editor in MyBB before 1.8.19 via a Video MyCode.43Plan
- CVE-2011-10018myBB 1.6.4 Backdoor Arbitrary Command Execution41Plan
- CVE-2017-16780The installer in MyBB before 1.8.13 allows remote attackers to execute arbitrary code by writing to the configuration file.41Plan
- CVE-2011-5133Unspecified vulnerability in MyBB before 1.6.5 has unknown impact and attack vectors, related to an "unparsed user avatar in the buddy list.41Plan
- CVE-2015-2786Unspecified vulnerability in MyBB (aka MyBulletinBoard) before 1.8.4 has unknown attack vectors related to "Group join request notifications40Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| n/a n/a | 1.8.15 · description | Vendor (CNA) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- Administrator privileges are required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-829 · Inclusion of Functionality from Untrusted Control SphereCVSS vector
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Code InclusionCAPEC-175likelihood: Medium · Very High
- Serialized Data External LinkingCAPEC-201likelihood: High · High
- DTD InjectionCAPEC-228Medium
- Local Code InclusionCAPEC-251Medium
- PHP Local File InclusionCAPEC-252Medium
- Remote Code InclusionCAPEC-253
- Force Use of Corrupted FilesCAPEC-263Medium
- Open-Source Library ManipulationCAPEC-538likelihood: Low · High
ATT&CK techniques
- Process InjectionT1055
- Browser ExtensionsT1176
- Supply Chain Compromise: Software Dependencies and Development ToolsT1195.001
- Server Software Component: IIS ComponentsT1505.004
- Server Software Component: Terminal Services DLLT1505.005
- Hijack Execution Flow: Dynamic Linker HijackingT1574.006
- Hijack Execution Flow: KernelCallbackTableT1574.013
- Reflective Code LoadingT1620
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- www.batterystapl.es/2018/03/local-file-inclusion-and-reading.html
- blog.mybb.com/2018/03/15/mybb-1-8-15-released-security-maintenance-release/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.