CVE-2022-27228Known exploitationPublic exploitNetwork attack vector

Unauthenticated code execution via upload event callbacks

Published Mar 22, 2022 · Updated Aug 3, 2024

Remote code execution in Bitrix Site Manager before 21.0.100 allows remote attackers to run arbitrary code through unauthenticated Vote module requests. The /bitrix/tools/vote/uf.php endpoint accepts attacker-controlled attachId event-handler arrays and invokes CAllAgent::Update during an upload. No account or user interaction is required; successful exploitation writes attacker-controlled files and executes code in the web application's context.

CVSS severity9.8
Critical
EPSS probability20.78%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Bitrix Site Manager before 21.0.100 allows remote attackers to run arbitrary code through unauthenticated Vote module requests. The /bitrix/tools/vote/uf.php endpoint accepts attacker-controlled attachId event-handler arrays and invokes CAllAgent::Update during an upload. No account or user interaction is required; successful exploitation writes attacker-controlled files and executes code in the web application's context.

The record

CVE
CVE-2022-27228
Published
Mar 22, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 22, 2022CVE 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?

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

10.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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