CVE-2019-1258

mediumpriority · track · 36EPSS 0.038 · 90 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.80% (90th) EPSS

CVSS 6.5 · medium

Is it mine?

14 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-28

An elevation of privilege vulnerability exists in Azure Active Directory Authentication Library On-Behalf-Of flow, in the way the library caches tokens. This vulnerability allows an authenticated attacker to perform actions in context of another user. The authenticated attacker can exploit this vulneraiblity by accessing a service configured for On-Behalf-Of flow that assigns incorrect tokens. This security update addresses the vulnerability by removing fallback cache look-up for On-Behalf-Of scenarios.

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–8.8

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4

v3.08.8highCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.08.8highCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV

v3.08.1highCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.18.8highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-264USCWE-269US

affected products (14)

Products and version ranges known to be affected.

Microsoft ADAL.NET5.0.0 → publicationenisa_euvdEU
Microsoft Nuget 5.2.05.0.0 → publicationenisa_euvdEU
Microsoft Corp Active Directory Authentication Library≤ 5.0.2fstec_bduRU
Microsoft Corp Active Directory Authentication Library≤ 5.0.0fstec_bduRU
Microsoft Corp Active Directory Authentication Library≤ 5.0.1fstec_bduRU
Microsoft Corp Active Directory Authentication Library≤ 5.0.3fstec_bduRU
Microsoft Corp Nuget≤ 5.2.0fstec_bduRU
microsoft active directory authentication library= 5.0.0nvdUScpe:2.3:a:microsoft:active_directory_authentication_library:*:*:*:*:*:*:*:*
microsoft active directory authentication library= 5.0.1nvdUScpe:2.3:a:microsoft:active_directory_authentication_library:*:*:*:*:*:*:*:*
microsoft active directory authentication library= 5.0.2nvdUScpe:2.3:a:microsoft:active_directory_authentication_library:*:*:*:*:*:*:*:*
microsoft active directory authentication library= 5.0.3nvdUScpe:2.3:a:microsoft:active_directory_authentication_library:*:*:*:*:*:*:*:*
microsoft active directory authentication library5.0.5 → 5.2.0nvdUScpe:2.3:a:microsoft:active_directory_authentication_library:*:*:*:*:*:*:*:*
microsoft nuget= 5.2.0nvdUScpe:2.3:a:microsoft:nuget:*:*:*:*:*:*:*:*
NuGet microsoft.identitymodel.clients.activedirectory5.0.0 → 5.2.0osvUSpkg:nuget/microsoft.identitymodel.clients.activedirectory

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-xc6x-cq47-9chwVulnerability in Azure Active Directory Authentication Library2019-08-16ghsa · osvUS
An elevation of privilege vulnerability exists in Azure Active Directory Authentication Library On-Behalf-Of flow, in the way the library caches tokens, aka 'Azure Active Directory Authentication Library Elevation of Privilege Vulnerability'.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2019-08-14modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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