CVE-2021-44916Public exploitNetwork attack vector

Browser script execution via unsafe URL reconstruction

Published Dec 20, 2021 · Updated Aug 4, 2024

Cross-site scripting in Opmantek Open-AudIT Community 4.2.0 and earlier allows remote attackers to execute JavaScript in a user's browser. The create_url helper concatenates untrusted HTTP_HOST and PHP_SELF server values into HTML links without output encoding. Exploitation requires a logged-in user to click the crafted URL, after which attacker-controlled script runs in that user's browser context.

CVSS severity6.1
Medium
EPSS probability3.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Opmantek Open-AudIT Community 4.2.0 and earlier allows remote attackers to execute JavaScript in a user's browser. The create_url helper concatenates untrusted HTTP_HOST and PHP_SELF server values into HTML links without output encoding. Exploitation requires a logged-in user to click the crafted URL, after which attacker-controlled script runs in that user's browser context.

The record

CVE
CVE-2021-44916
Published
Dec 20, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

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

4.3NIST National Vulnerability DatabaseAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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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