Session fixation attack in Pow (Hex package)
Priority LOW 30CWE-384Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-384.
Summary
In Pow (Hex package) before 1.0.16, the use of Plug.Session in Pow.Plug.Session is susceptible to session fixation attacks if a persistent session store is used for Plug.Session, such as Redis or a database. Cookie store, which is used in most Phoenix apps, doesn't have this vulnerability.
Why it matters now
EPSS 0.0077 55th percentileScored 2026-11-07
Fix Fixed Pow (danschultzer): 1.0.16pow (Hex): 1.0.16
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| danschultzer | Pow | before 1.0.16 | 1.0.16 | Patch available | CNA |
| — | pow (Hex) | before 1.0.16 | 1.0.16 | Patch available | GHSA-v2wf-c3j6-wpvw |
- Pow Vendordanschultzer Affected before 1.0.16 Fixed in 1.0.16 Patch available CNA
- pow (Hex) Vendor— Affected before 1.0.16 Fixed in 1.0.16 Patch available GHSA-v2wf-c3j6-wpvw
Remediation
- Fix · CNA Pow (danschultzer) Fixed in 1.0.16
- Fix · GHSA-v2wf-c3j6-wpvw pow (Hex) Fixed in 1.0.16 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2020-5205
- 2026-10-03 Alias added: GHSA-v2wf-c3j6-wpvw
References
Advisory 3
More pow-auth Pow vulnerabilities
- TI-2023-22611 Pow Mnesia cache doesn't invalidate all expired keys on startup CVSS 3.1MEDIUM 6.5
Sources
- CVE-2020-5205 · CVE Program
- CVE-2020-5205 · NVD
- FIRST EPSS
- GHSA-v2wf-c3j6-wpvw · GitHub Advisory Database · CC BY 4.0
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