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CVE-2021-42580

47
FAUCET Score

CVE-2021-42580 is a critical vulnerability affecting Sourcecodester Online Learning System 2.0. It involves an SQL injection authentication bypass in the admin login, coupled with an authenticated file upload flaw, which can be chained to achieve unauthenticated remote command execution. With a CVSS score of 9.8 (Critical), this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While not listed on CISA's KEV catalog, an exploit is publicly available on ExploitDB, and it has garnered significant community discussion, indicating awareness and potential for exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
2.0CPE matchmatch criteria
cpe:2.3:a:oretnom23:online_learning_system:2.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
9.98%
Probability of exploitation in next 30 days
EPSS Percentile
95.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-50526 · Nov 16, 2021
This CVE's current EPSS score of 0.0998 is in the 91st percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/164985/Online-Learning-System-2.0-Remote-Code-Execution.html
ExploitThird Party AdvisoryVDB Entry
github.com / DjebbarAnon/online-learning-system-v2-sqli-authentication-bypass-file-upload-unauthenticated-RCE
ExploitThird Party Advisory
github.com / nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/oretnom23/CVE-nu11-07
ExploitThird Party Advisory
nu11secur1ty.com / 2021/09/cve-nu11-07-elearning-v2by-oretnom23-is.html
ExploitThird Party Advisory
nu11secur1ty.com / 2021/11/cve-2021-42580.html
ExploitThird Party Advisory