CVE-2024-36823Public exploitNetwork attack vector

Session-data disclosure via deterministic AES-ECB cookies

Published Jun 6, 2024 · Updated Mar 25, 2025

Weak encryption in Ninja Core 7.0.0 allows remote attackers to infer sensitive session data from encrypted cookies. CookieEncryption.encrypt requests AES without a mode, causing Java to use deterministic ECB encryption with no initialization vector. Exploitation requires access to encrypted session cookies with repeated plaintext blocks; identical blocks produce identical ciphertext and reveal data patterns.

CVSS severity7.5
High
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak encryption in Ninja Core 7.0.0 allows remote attackers to infer sensitive session data from encrypted cookies. CookieEncryption.encrypt requests AES without a mode, causing Java to use deterministic ECB encryption with no initialization vector. Exploitation requires access to encrypted session cookies with repeated plaintext blocks; identical blocks produce identical ciphertext and reveal data patterns.

The record

CVE
CVE-2024-36823
Published
Jun 6, 2024
Updated
Mar 25, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-327, CWE-326
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2025Record 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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

CWE-327Use of a Broken or Risky Cryptographic Algorithm
CWE-326Inadequate Encryption Strength

Public exploit references

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Technologies

Your stack

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Your stack

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