CVE-2021-27964 (GCVE-0-2021-27964)

Vulnerability from cvelistv5 – Published: 2021-03-05 01:37 – Updated: 2024-08-03 21:33
VLAI Previdian
Summary
SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send a POST request to /Config/SaveUploadedHotspotLogoFile without any authentication or session header. There is no check for the file extension or content of the uploaded file.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
References
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: fc1bd62c-ce75-4a6d-b7f7-2ea2e10a2678

Vulnerability ID: CVE-2021-27964

Status: Confirmed

Status Updated: 2025-06-05 02:00 CEST

Exploited: Yes

Timestamps
First Seen: 2025-06-05
Asserted: 2025-06-05
Scope
Notes: SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send a POST request to... | Affected: SonLogger / SonLogger | CVSS: 9.8 (CRITICAL) | EPSS: 0.47519 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send a POST request to...
Cve Id CVE-2021-27964
Vendor SonLogger
Ghsa Id None
Product SonLogger
Added Date 2025-06-05T00:00:00.000Z
Cvss Score 9.8
Epss Score 0.47519
Previous Ids
Cvss Severity CRITICAL
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.98809
Used In Malware unknown
Vulnerability Id CVE-2021-27964
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-10-02 09:09 CEST | Updated: 2026-10-02 09:09 CEST
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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