CVE-2020-36726Network attack vector

Unauthenticated object injection via serialized cookies

Published Jun 7, 2023 · Updated Apr 8, 2026

PHP object injection in Rustaurius Ultimate Reviews before 2.1.33 allows remote attackers to inject objects through crafted cookies. EWD_URP_Update_Karama, review submission, and SelectReview pass attacker-controlled cookie values through stripslashes into unserialize. The paths are reachable without authentication, but the plugin contains no POP chain, so object injection alone does not establish code execution.

CVSS severity9.8
Critical
EPSS probability1.55%
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 Rustaurius Ultimate Reviews before 2.1.33 allows remote attackers to inject objects through crafted cookies. EWD_URP_Update_Karama, review submission, and SelectReview pass attacker-controlled cookie values through stripslashes into unserialize. The paths are reachable without authentication, but the plugin contains no POP chain, so object injection alone does not establish code execution.

The record

CVE
CVE-2020-36726
Published
Jun 7, 2023
Updated
Apr 8, 2026
Vendor
Rustaurius
Product
Ultimate Reviews
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <2.1.33

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rustaurius · Ultimate Reviewsversion=0 <2.1.33

Published CVSS scores

9.8WordfenceCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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