CVE-2020-8434Public exploitNetwork attack vector

Unauthenticated account impersonation via deterministic authentication cookie

Published May 19, 2020 · Updated Aug 4, 2024

Authentication bypass in affected Jenzabar JICS 9.x releases allows remote attackers to impersonate any database user via a forged cookie. JICS accepts a persistent JICSLoginCookie before normal session authentication, deriving its AES value from a username with a hard-coded PBKDF password and static salt. Knowledge of a valid username is sufficient to forge the cookie, bypass passwords and implemented MFA, and obtain that account's application permissions.

CVSS severity9.8
Critical
EPSS probability1.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in affected Jenzabar JICS 9.x releases allows remote attackers to impersonate any database user via a forged cookie. JICS accepts a persistent JICSLoginCookie before normal session authentication, deriving its AES value from a username with a hard-coded PBKDF password and static salt. Knowledge of a valid username is sufficient to forge the cookie, bypass passwords and implemented MFA, and obtain that account's application permissions.

The record

CVE
CVE-2020-8434
Published
May 19, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-384, T1606.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 19, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:P/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.

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-384Session Fixation
T1606.001Forge Web Credentials: Web Cookies

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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