Directory traversal vulnerability in MyBB (aka MyBulletinBoard) 1.4.10, and possibly…
Priority LOW 34CWE-22Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.
Summary
Directory traversal vulnerability in MyBB (aka MyBulletinBoard) 1.4.10, and possibly earlier versions, when changing the user avatar from the gallery, allows remote authenticated users to determine the existence of files via directory traversal sequences in the avatar and possibly the gallery parameters, related to (1) admin/modules/user/users.php and (2) usercp.php.
Why it matters now
EPSS 0.02698 86th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2009-4449
- 2026-10-03 Alias added: GHSA-84hh-rjph-rr29
References
Exploit 2
Advisory 1
Other 6
- [oss-security] 20101008 CVE request: mybb before 1.4.11 and before 1.4.12
- [oss-security] 20101011 Re: CVE request: mybb before 1.4.11 and before 1.4.12
- http://dev.mybboard.net/issues/617
- [oss-security] 20101206 Re: CVE request: mybb before 1.4.11 and before 1.4.12
- 61359
- http://blog.mybboard.net/2009/12/29/mybb-1-4-11-released-minor-patch-security-update/
More Mybb vulnerabilities
- TI-2011-04621 myBB 1.6.4 Backdoor Arbitrary Command Execution CVSS 4.0CRITICAL 10.0
- TI-2022-08548 Remote code execution in mybb CVSS 3.1HIGH 7.2
- TI-2023-21959 MyBB before 1.8.36 allows Code Injection by users with certain high privileges. CVSS 3.1HIGH 7.2
- TI-2022-18641 Mail settings' command parameter injection in mybb CVSS 3.1HIGH 7.2
- TI-2025-21092 An issue in MyBB 1.8.38 allows a remote attacker to obtain sensitive information via the… CVSS 3.1HIGH 7.6
- TI-2025-21091 An issue in MyBB 1.8.38 allows a remote attacker to obtain sensitive information via the… CVSS 3.1HIGH 7.6
Sources
- CVE-2009-4449 · CVE Program
- CVE-2009-4449 · NVD
- FIRST EPSS
- GHSA-84hh-rjph-rr29 · GitHub Advisory Database · CC BY 4.0
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