CVE-2020-21884Public exploitNetwork attack vector

Device reconfiguration via missing CSRF validation

Published Apr 9, 2021 · Updated Jul 9, 2026

CSRF in WiFi-soft UniBox 2.4 allows remote attackers to reconfigure hotspot controllers through crafted management requests. The management interface accepts state-changing requests at five endpoints without validating a CSRF token, while network-trace also fails to sanitize its filter parameter. An authenticated administrator must open the crafted URL; injected script can access that browser session and support account takeover or device reconfiguration.

CVSS severity8.8
High
EPSS probability1.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in WiFi-soft UniBox 2.4 allows remote attackers to reconfigure hotspot controllers through crafted management requests. The management interface accepts state-changing requests at five endpoints without validating a CSRF token, while network-trace also fails to sanitize its filter parameter. An authenticated administrator must open the crafted URL; injected script can access that browser session and support account takeover or device reconfiguration.

The record

CVE
CVE-2020-21884
Published
Apr 9, 2021
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2021CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.3NIST NVDAV:N/AC:M/Au:N/C:C/I:C/A:C
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1204.001User Execution: Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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