CVE-2021-28411Public exploitNetwork attack vector

Remote code execution via cookie deserialization

Published Aug 11, 2023 · Updated Oct 9, 2024

Deserialization in RuoYi 3.4.0 allows remote attackers to execute system commands through a crafted Apache Shiro persistent-login cookie. The custom CookieRememberMeManager invokes getRememberedSerializedIdentity on attacker-controlled cookie data while retaining a default cryptographic key and a usable Commons Collections gadget chain. No account is required; successful deserialization runs system commands with the RuoYi service's privileges.

CVSS severityUnavailable
Unscored
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in RuoYi 3.4.0 allows remote attackers to execute system commands through a crafted Apache Shiro persistent-login cookie. The custom CookieRememberMeManager invokes getRememberedSerializedIdentity on attacker-controlled cookie data while retaining a default cryptographic key and a usable Commons Collections gadget chain. No account is required; successful deserialization runs system commands with the RuoYi service's privileges.

The record

CVE
CVE-2021-28411
Published
Aug 11, 2023
Updated
Oct 9, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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

No CVSS assessment is available in this record.

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 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

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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