CVE-2021-20851Public exploitNetwork attack vector

Unauthorized settings changes via missing CSRF checks

Published Dec 1, 2021 · Updated Aug 3, 2024

Cross-site request forgery in Aftab Muni Browser and Operating System Finder before 1.2 allows remote attackers to alter plugin settings. The settings-save path accepts attacker-chosen POST parameters without verifying an anti-CSRF nonce and stores them as plugin options. An administrator must be signed in and visit a crafted page, enabling unauthorized settings changes and potentially stored script execution.

CVSS severity4.3
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Aftab Muni Browser and Operating System Finder before 1.2 allows remote attackers to alter plugin settings. The settings-save path accepts attacker-chosen POST parameters without verifying an anti-CSRF nonce and stores them as plugin options. An administrator must be signed in and visit a crafted page, enabling unauthorized settings changes and potentially stored script execution.

The record

CVE
CVE-2021-20851
Published
Dec 1, 2021
Updated
Aug 3, 2024
Vendor
Aftab Muni
Product
Browser and Operating System Finder
Classifications
CWE-352, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 1, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=versions prior to 1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Aftab Muni · Browser and Operating System Finderversion=versions prior to 1.2

Published CVSS scores

2.6JPCERT/CC JVNAV:N/AC:H/Au:N/C:N/I:P/A:N
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
4.3JPCERT/CC JVNCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

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)
T1190Exploit Public-Facing Application

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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