CVE-2020-5205 json
Session fixation attack in Pow (Hex package)
published 2020-01-09 6 y ago modified 2026-07-08 4 mo ago also GHSA-v2wf-c3j6-wpvw , EUVD-2022-1831
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
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.
Patch / fix
Exploit prediction
0.77% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| NVD | 2.0 | 5.5 | AV:N/AC:L/Au:S/C:P/I:P/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| hex | pow | <1.0.16 |
1.0.16 |
Affected products
- danschultzer Pow
Classification
- Weakness
-
- CWE-384 Session Fixation
References
-
github.com
/danschultzer/pow/commit/578ffd3d8bb8e8a26077b644222186b108da474f
web, patch, third-party-advisory
-
github.com
/danschultzer/pow/security/advisories/GHSA-v2wf-c3j6-wpvw
web, third-party-advisory
-
github.com
/danschultzer/pow/blob/master/CHANGELOG.md#v1016-2020-01-07
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-5205
advisory
-
github.com
/danschultzer/pow
package
Sources
- CVE List CVE-2020-5205
- GitHub Advisory GHSA-v2wf-c3j6-wpvw
- NVD CVE-2020-5205
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