CVE-2023-50259Public exploitNetwork attack vector

Unauthenticated blind SSRF via Slack webhook

Published Dec 22, 2023 · Updated Nov 27, 2024

Blind SSRF in PyMedusa Medusa before 1.0.19 allows remote attackers to send POST requests from the server via a crafted Slack webhook URL. The unauthenticated /home/testslack handler passes the user-controlled slack_webhook value through Slack notifier methods to requests.post without destination validation. Network access to the endpoint is sufficient to make blind outbound POST requests, while response text reveals only whether the destination returned a successful status.

CVSS severity5.3
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Blind SSRF in PyMedusa Medusa before 1.0.19 allows remote attackers to send POST requests from the server via a crafted Slack webhook URL. The unauthenticated /home/testslack handler passes the user-controlled slack_webhook value through Slack notifier methods to requests.post without destination validation. Network access to the endpoint is sufficient to make blind outbound POST requests, while response text reveals only whether the destination returned a successful status.

The record

CVE
CVE-2023-50259
Published
Dec 22, 2023
Updated
Nov 27, 2024
Vendor
PyMedusa
Product
Medusa
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 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?

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

  1. Affected versionversion=< 1.0.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PyMedusa · Medusaversion=< 1.0.19

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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 exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

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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