CVE-2023-28444Network attack vector

Backend secret disclosure via workspace-wide variable detection

Published Mar 24, 2023 · Updated Feb 24, 2025

Information disclosure in Kyubisation angular-server-side-configuration 15.0.0 through 15.0.x allows remote attackers to read backend secrets. Version 15 widens the builder's TypeScript search from an environment file to the entire Angular workspace, records matched backend environment-variable names in ngssc.json, and later inserts their deployment values into index.html. Exposure requires a monorepo with a backend component whose referenced variables are available in the frontend deployment environment; plain Angular projects without a backend are unaffected.

CVSS severity9.9
Critical
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Kyubisation angular-server-side-configuration 15.0.0 through 15.0.x allows remote attackers to read backend secrets. Version 15 widens the builder's TypeScript search from an environment file to the entire Angular workspace, records matched backend environment-variable names in ngssc.json, and later inserts their deployment values into index.html. Exposure requires a monorepo with a backend component whose referenced variables are available in the frontend deployment environment; plain Angular projects without a backend are unaffected.

The record

CVE
CVE-2023-28444
Published
Mar 24, 2023
Updated
Feb 24, 2025
Vendor
Kyubisation
Product
angular-server-side-configuration
Classifications
CWE-538, CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 24, 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?

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

  1. Affected versionversion=>= 15.0.0, < 15.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kyubisation · angular-server-side-configurationversion=>= 15.0.0, < 15.1.0

Published CVSS scores

9.9GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L
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.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-538Insertion of Sensitive Information into Externally-Accessible File or Directory
CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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