CVE-2023-1717Public exploitNetwork attack vector

Browser code execution via prototype-polluting query keys

Published Nov 1, 2023 · Updated Sep 5, 2024

Prototype pollution in Bitrix24 22.0.300 and earlier allows remote attackers to execute JavaScript in a victim's browser via a crafted URL. core.js parseQuery passes attacker-controlled bracketed keys to getParser, which assigns proto properties without rejecting prototype keys. Execution requires a victim to visit an affected page; an administrator's session also exposes the server's PHP Command Line feature to command execution.

CVSS severity9.6
Critical
EPSS probability1.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prototype pollution in Bitrix24 22.0.300 and earlier allows remote attackers to execute JavaScript in a victim's browser via a crafted URL. core.js parseQuery passes attacker-controlled bracketed keys to getParser, which assigns proto properties without rejecting prototype keys. Execution requires a victim to visit an affected page; an administrator's session also exposes the server's PHP Command Line feature to command execution.

The record

CVE
CVE-2023-1717
Published
Nov 1, 2023
Updated
Sep 5, 2024
Vendor
Bitrix24
Product
Bitrix24
Classifications
CWE-79, CWE-1321, CAPEC-588, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 5, 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=0 <=22.0.300

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Bitrix24 · Bitrix24version=0 <=22.0.300

Published CVSS scores

9.6STAR Labs SG Pte. Ltd.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CAPEC-588DOM-Based XSS
T1203Exploitation for Client Execution

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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