CVE-2021-43103
HIGHCVSS 7.2/10EPSS 1.53%
Last modified
CVE-2021-43103 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. A File Upload vulnerability exists in bbs 5.3 is via ForumManageAction.java in a GetType function, which lets a remote malicious user execute arbitrary code.. EPSS estimates a 1.53% chance of exploitation in the next 30 days.
Description
A File Upload vulnerability exists in bbs 5.3 is via ForumManageAction.java in a GetType function, which lets a remote malicious user execute arbitrary code.
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 |
|---|---|---|
| Diyhi | Bbs | 5.3 |
References
- https://github.com/diyhi/bbs/issues/51Exploit, Third Party Advisory
- https://github.com/diyhi/bbs/issues/51Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-43103?
A File Upload vulnerability exists in bbs 5.3 is via ForumManageAction.java in a GetType function, which lets a remote malicious user execute arbitrary code.
How severe is CVE-2021-43103?
CVE-2021-43103 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 1.53% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43103?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
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-2021-43098A File Upload vulnerability exists in bbs v5.3 via QuestionM…7.2
- CVE-2021-43099An Archive Extraction (AKA "Zip Slip) vulnerability exists i…4.9
- CVE-2021-4310A vulnerability was found in 01-Scripts 01-Artikelsystem. It…6.1
- CVE-2021-43100A File Upload vulnerability exists in bbs 5.3 is via TopicMa…7.2
- CVE-2021-43101A File Upload vulnerability exists in bbs 5.3 is via Members…7.2
- CVE-2021-43102A File Upload vulnerability exists in bbs 5.3 is via HelpMan…7.2
- CVE-2021-43105A vulnerability in the bailiwick checking function in Techni…4.3
- CVE-2021-43106A Header Injection vulnerability exists in Compass Plus Tran…6.1
- CVE-2021-43109An SQL Injection vulnerability exits in PuneethReddyHC onlin…7.5
- CVE-2021-4311A vulnerability classified as problematic was found in Talen…9.8
- CVE-2021-43110An Access Conrol vulnerability exists in PuneethReddyHC onli…9.8
- CVE-2021-43113iTextPDF in iText 7 and up to (excluding 4.4.13.3) 7.1.17 al…9.8
Are you affected by CVE-2021-43103?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST