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Fencer Intel
high 8.8

CVE-2021-36461 json

An Arbitrary File Upload vulnerability exists in Microweber 1.1.3 that allows attackers to getshell via the Settings Upload Picture section…

published 4y ago modified 4mo ago also EUVD-2021-23063

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

An Arbitrary File Upload vulnerability exists in Microweber 1.1.3 that allows attackers to getshell via the Settings Upload Picture section by uploading pictures with malicious code, user.ini.

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Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/microweber/microweber/issues/751 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Classification

Weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type

References

Sources

Fencer Intel 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.