CVE-2020-11691Network attack vector

Unauthenticated OAuth error-message content spoofing

Published Apr 22, 2020 · Updated Aug 4, 2024

Content spoofing in JetBrains Hub before 2020.1.12099 allows remote attackers to display false OAuth error content via network requests. JetBrains has not published which OAuth error-message input or rendering operation permits attacker-controlled content to be displayed. The OAuth error path is remotely reachable without authentication, and exploitation can mislead users without a reported confidentiality or availability impact.

CVSS severity7.5
High
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Content spoofing in JetBrains Hub before 2020.1.12099 allows remote attackers to display false OAuth error content via network requests. JetBrains has not published which OAuth error-message input or rendering operation permits attacker-controlled content to be displayed. The OAuth error path is remotely reachable without authentication, and exploitation can mislead users without a reported confidentiality or availability impact.

The record

CVE
CVE-2020-11691
Published
Apr 22, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1565.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 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

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5.0NVDAV:N/AC:L/Au:N/C:N/I:P/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

T1565.003Runtime Data Manipulation

Public exploit references

No public exploit references are available in this record.

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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