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GAdvisory
PSA-2026-04-SRGACVE-2024-34351GCVE-125-2026-04-SRGAApril 19, 2026
7.5 High

High-Severity SSRF in Postiz App

High-Severity SSRF in Postiz App

Affected (1)

  • gitroomhqpostiz-app
    • ≥ 0Fixed in 2.21.1Affected

    All other versions: Unaffected

Mitigations

Solutions

  • Upgrade to v2.21.1 or later.

Exploits

  • Access to the internal network / services where Postiz is hosted.

Overview

Impact

A successful SSRF attack allows an attacker to:

  • Bypass firewalls to scan and interact with internal network services/ports.
  • Access sensitive cloud metadata services (e.g., AWS IMDS 169.254.169.254) to potentially leak instance credentials.
  • Pivot into the internal network environment where Postiz is hosted.

Workarounds

There are no workarounds known to this, please upgrade to Postiz version v2.21.1.

References

https://nvd.nist.gov/vuln/detail/CVE-2024-34351 http://cwe.mitre.org/data/definitions/918.html https://github.com/vercel/next.js/security/advisories/GHSA-fr5h-rqp8-mj6g

Severity

CVSS v3
7.5 High
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Weaknesses (1)

References (3)

Credits (2)

  • Enno Gelhaus
    Coordinator · @egelhaus
  • Nevo David
    Remediation developer · @nevo-david

Context

Impacts

  • Impacts could include: - Access sensitive cloud metadata services (e.g., AWS IMDS 169.254.169.254) to potentially leak instance credentials. - Access to sensitive internal services on the internal network. - Access to services used by Postiz. (Like Redis, PostgreSQL, Temporal etc.)

Timeline

  1. 03/24/2026 14:58

    Postiz received the initial report for the vulnerability.

  2. 03/25/2026 10:15

    Postiz developed the fix, verified it, created the release and published the advisory.

© 2026 Gelhaus Solutions