High
Postiz App has a High-Severity SSRF Vulnerability via Next.js
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.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | postiz | <= 2.0.12 | no fix |
References
CVSS score
7.5/10
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-1395, CWE-918- Platform
- npm
- Package
postiz- Disclosed
- 27.03.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-vj2p-7pgw-g2wf - CC BY 4.0
Vulnerability history: postiz
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 03.2026 03.2026
- Without a fix
- 2
- Exploited in attacks
- 0
Severity breakdown
- High 2
Disclosures per year
- 2026: 2
-
Postiz App has a High-Severity SSRF Vulnerability via Next.js this entry
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