CVE-2019-17268Network attack vector

Arbitrary code execution via embedded backdoor

Published Feb 7, 2020 · Updated Aug 5, 2024

Code injection in omniauth-weibo-oauth2 0.4.6 allows attackers to execute arbitrary code through an embedded backdoor. Public records identify the malicious RubyGems package, but neither the CNA record nor the upstream issue names the backdoor's file, trigger, or execution primitive. Exposure requires the yanked 0.4.6 gem to be installed; the injected code executes with the privileges of the Ruby application that loads it.

CVSS severity9.8
Critical
EPSS probability2.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in omniauth-weibo-oauth2 0.4.6 allows attackers to execute arbitrary code through an embedded backdoor. Public records identify the malicious RubyGems package, but neither the CNA record nor the upstream issue names the backdoor's file, trigger, or execution primitive. Exposure requires the yanked 0.4.6 gem to be installed; the injected code executes with the privileges of the Ruby application that loads it.

The record

CVE
CVE-2019-17268
Published
Feb 7, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1195.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 7, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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

9.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1195.002Compromise Software Supply Chain

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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