CVE-2023-3188Public exploitNetwork attack vector

Unauthenticated SSRF via followed HTTP redirects

Published Jun 10, 2023 · Updated Jan 6, 2025

SSRF in Owncast before 0.1.0 allows remote attackers to make the server request attacker-selected URLs through HTTP redirects. The WebFinger and IndieAuth HTTP clients followed redirects after initial destination handling, allowing a permitted URL to redirect the server to another host. No authentication or user interaction is required, and reachable internal services can be read or modified only to the extent their HTTP interfaces permit.

CVSS severity8.3
High
EPSS probability1.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Owncast before 0.1.0 allows remote attackers to make the server request attacker-selected URLs through HTTP redirects. The WebFinger and IndieAuth HTTP clients followed redirects after initial destination handling, allowing a permitted URL to redirect the server to another host. No authentication or user interaction is required, and reachable internal services can be read or modified only to the extent their HTTP interfaces permit.

The record

CVE
CVE-2023-3188
Published
Jun 10, 2023
Updated
Jan 6, 2025
Vendor
Owncast
Product
Owncast
Classifications
CWE-918, T1090
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 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?

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

  1. Affected versionversion=unspecified <0.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Owncast · Owncastversion=unspecified <0.1.0

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
8.3huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

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 exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1090Proxy

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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