CVE-2021-43281
Last modified
CVE-2021-43281 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. MyBB before 1.8.29 allows Remote Code Injection by an admin with the "Can manage settings?" permission. The Admin CP's Settings management module does not validate setting types correctly on insertion and update, making it possible to add settings of supported type "php" with PHP code, executed on Change Settings pages.. EPSS estimates a 1.29% chance of exploitation in the next 30 days.
Description
MyBB before 1.8.29 allows Remote Code Injection by an admin with the "Can manage settings?" permission. The Admin CP's Settings management module does not validate setting types correctly on insertion and update, making it possible to add settings of supported type "php" with PHP code, executed on Change Settings pages.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mybb | Mybb | >= 1.2.0, < 1.8.29 |
References
- https://github.com/mybb/mybb/security/advisories/GHSA-8gxx-vmr9-h39pPatch, Release Notes, Third Party Advisory
- https://github.com/mybb/mybb/security/advisories/GHSA-8gxx-vmr9-h39pPatch, Release Notes, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-43281?
How severe is CVE-2021-43281?
How do I fix CVE-2021-43281?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-43276An Out-of-bounds Read vulnerability exists in Open Design Al…7.8
- CVE-2021-43277An out-of-bounds read vulnerability exists in the U3D file r…7.8
- CVE-2021-43278An Out-of-bounds Read vulnerability exists in the OBJ file r…7.8
- CVE-2021-43279An out-of-bounds write vulnerability exists in the U3D file …7.8
- CVE-2021-4328A vulnerability has been found in 狮子鱼CMS and classified as c…9.8
- CVE-2021-43280A stack-based buffer overflow vulnerability exists in the DW…7.8
- CVE-2021-43282An issue was discovered on Victure WR1200 devices through 1.…6.5
- CVE-2021-43283An issue was discovered on Victure WR1200 devices through 1.…8.8
- CVE-2021-43284An issue was discovered on Victure WR1200 devices through 1.…7.8
- CVE-2021-43286An issue was discovered in ThoughtWorks GoCD before 21.3.0. …8.8
- CVE-2021-43287An issue was discovered in ThoughtWorks GoCD before 21.3.0. …7.5
- CVE-2021-43288An issue was discovered in ThoughtWorks GoCD before 21.3.0. …5.4
Are you affected by CVE-2021-43281?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST