CVE-2020-5331Public exploit

Administrator session access via logged cookie

Published May 4, 2020 · Updated Sep 17, 2024

Information exposure in Advanced Workflow in Archer Platform before 6.7.0.3 allows local users to obtain administrator session cookies. The authorization flow places ArcherSessionCookie in a GET query string, allowing caches and request logs to retain the active value. Access to those records is required; replaying the cookie grants the administrator session accepted by Advanced Workflow.

CVSS severity8.8
High
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in Advanced Workflow in Archer Platform before 6.7.0.3 allows local users to obtain administrator session cookies. The authorization flow places ArcherSessionCookie in a GET query string, allowing caches and request logs to retain the active value. Access to those records is required; replaying the cookie grants the administrator session accepted by Advanced Workflow.

The record

CVE
CVE-2020-5331
Published
May 4, 2020
Updated
Sep 17, 2024
Vendor
Archer
Product
Archer Platform
Classifications
CWE-598, CWE-200, T1550.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 4, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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?

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

  1. Affected versionversion=unspecified <6.7 P3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Archer · Archer Platformversion=unspecified <6.7 P3

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
8.8DellCVSS:3.1/AV:N/AC:L/PR:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-598Use of GET Request Method With Sensitive Query Strings
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1550.004Use Alternate Authentication Material: Web Session Cookie

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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