CVE-2021-3239
CVE-2021-3239 is a critical-severity vulnerability in E-learning System Project E-learning System with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-89.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 18% (97th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-89
- Affected product: E-learning System Project E-learning System
- Published:
- Last modified:
Description
E-Learning System 1.0 suffers from an unauthenticated SQL injection vulnerability, which allows remote attackers to execute arbitrary code on the hosting web server and gain a reverse shell.
Frequently asked questions
- What is CVE-2021-3239?
- E-Learning System 1.0 suffers from an unauthenticated SQL injection vulnerability, which allows remote attackers to execute arbitrary code on the hosting web server and gain a reverse shell.
- How severe is CVE-2021-3239?
- CVE-2021-3239 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-3239 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-3239?
- CVE-2021-3239 affects E-learning System Project E-learning System. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-3239?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-3239 published?
- CVE-2021-3239 was published on 2021-02-15 and last updated on 2026-06-17.
References
- https://github.com/TCSWT/E-Learning-System/blob/main/README.md
- https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/janobe/CVE-nu11-101821
- https://packetstormsecurity.com/files/160966/E-Learning-System-1.0-SQL-Injection-Shell-Upload.html
- https://www.exploit-db.com/exploits/49434
- https://www.sourcecodester.com/php/12808/e-learning-system-using-phpmysqli.html
Affected products (1)
- cpe:2.3:a:e-learning_system_project:e-learning_system:1.0:*:*:*:*:*:*:*
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