CVE-2021-42671

mediumpriority · attend · 47EPSS 0.197 · 97 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

19.7% (97th) EPSS

CVSS 5 · medium

Is it mine?

2 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-26

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-425USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

0xDeku/CVE-2021-42671CVE-2021-42671 - Broken access control vulnerability in the Engineers online portal system. PoC · poc_in_github

affected products (2)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
engineers online portal project engineers online portalall versionsnvdUScpe:2.3:a:engineers_online_portal_project:engineers_online_portal:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-11-05modified 2026-06-17

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+407 more

references (10)

External citations — patches, advisories, analysis.

scry

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