CVE-2024-56058Public exploitNetwork attack vector

Unauthenticated object injection via crafted favorites cookie

Published Dec 18, 2024 · Updated Apr 28, 2026

PHP object injection in Gueststream VRPConnector 2.0.1 and earlier allows remote attackers to inject objects via an HTTP cookie. The plugin deserializes attacker-controlled object data supplied through the vrpFavorites cookie without rejecting PHP objects. No authentication or user interaction is required, but code execution, file deletion, or data access requires a usable POP chain from another installed component.

CVSS severity9.8
Critical
EPSS probability1.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP object injection in Gueststream VRPConnector 2.0.1 and earlier allows remote attackers to inject objects via an HTTP cookie. The plugin deserializes attacker-controlled object data supplied through the vrpFavorites cookie without rejecting PHP objects. No authentication or user interaction is required, but code execution, file deletion, or data access requires a usable POP chain from another installed component.

The record

CVE
CVE-2024-56058
Published
Dec 18, 2024
Updated
Apr 28, 2026
Vendor
Gueststream
Product
VRPConnector
Classifications
CWE-502, CAPEC-586, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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?

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

  1. Affected versionversion=0 <=2.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gueststream · VRPConnectorversion=0 <=2.0.1

Published CVSS scores

9.8PatchstackCVSS: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.

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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-502Deserialization of Untrusted Data
CAPEC-586Object Injection
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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