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Fencer Vulns
high 7.5

CVE-2021-42671 in the critical feed json

An incorrect access control vulnerability exists in Sourcecodester Engineers Online Portal in PHP in nia_munoz_monitoring_system/admin/uplo…

published 2021-11-05 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29632

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
19.8%
EPSS 19.8% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

An incorrect access control vulnerability exists in Sourcecodester Engineers Online Portal in PHP in nia_munoz_monitoring_system/admin/uploads. An attacker can leverage this vulnerability in order to bypass access controls and access all the files uploaded to the web server without the need of authentication or authorization.

Exploit prediction

19.83% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/TheHackingRabbi/CVE-2021-42671 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-42671 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.