CVE-2023-27172Public exploitNetwork attack vector

Unauthenticated account impersonation via weak JWT secret

Published Dec 20, 2023 · Updated May 6, 2025

Authentication bypass in Xpand IT Write-back Manager 2.3.1 allows remote attackers to impersonate users with forged JWTs. The manager and Tableau plug-in sign session tokens with the same hard-coded secret stored in WEB-INF/classes/config.yml, which a common-word dictionary cracks. No prior account is required; a forged token can alter claims, open manager or plug-in sessions as any user, and cross otherwise unrelated manager instances.

CVSS severity9.1
Critical
EPSS probability0.67%
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 Xpand IT Write-back Manager 2.3.1 allows remote attackers to impersonate users with forged JWTs. The manager and Tableau plug-in sign session tokens with the same hard-coded secret stored in WEB-INF/classes/config.yml, which a common-word dictionary cracks. No prior account is required; a forged token can alter claims, open manager or plug-in sessions as any user, and cross otherwise unrelated manager instances.

The record

CVE
CVE-2023-27172
Published
Dec 20, 2023
Updated
May 6, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-307, T1550.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 20, 2023CVE publishedPublication date reported by the CVE source.
  2. May 6, 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

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 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 exploitPublished

Weakness, pattern, technique

CWE-307Improper Restriction of Excessive Authentication Attempts
T1550.001Application Access Token

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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