9.1crit
CVE-2016-8638
Session Fixation in ipsilon
Also known as GHSA-376m-3rm2-9jm6, PYSEC-2026-360
Published 9 y ago · modified 10 d ago · JSON
CVSS
9.1
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
2.1%
percentile 82%
Public exploits
0
none known
Summary
A vulnerability in ipsilon 2.0 before 2.0.2, 1.2 before 1.2.1, 1.1 before 1.1.2, and 1.0 before 1.0.3 was found that allows attacker to log out active sessions of other users. This issue is related to how it tracks sessions, and allows an unauthenticated attacker to view and terminate active sessions from other users. It is also called a "SAML2 multi-session vulnerability."
Exploit prediction (EPSS)
2.14% probability of exploitation in the next 30 days, higher than 82% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.0 | 9.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:P/I:N/A:P |
| OSV | 3.0 | 9.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| GitHub | 3.0 | 9.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pypi | ipsilon | >=2.0.0, <2.0.2 >=1.2.0, <1.2.1 >=1.1.0, <1.1.2 >=1.0.0, <1.0.3 | 2.0.2 1.2.1 1.1.2 1.0.3 |
Classification
- Weakness
- CWE-384 Session Fixation
References
- ipsilon-project.org /release/2.1.0.html · x_refsource_CONFIRM, x_transferred
- bugzilla.redhat.com /show_bug.cgi?id=CVE-2016-8638 · x_refsource_CONFIRM, x_transferred
- pagure.io /ipsilon/c/511fa8b7001c2f9a42301aa1d4b85aaf170a461c · x_refsource_CONFIRM, x_transferred
- ipsilon-project.org /advisory/CVE-2016-8638.txt · x_refsource_CONFIRM, x_transferred
- securityfocus.com /bid/94439 · vdb-entry, x_refsource_BID, x_transferred
- rhn.redhat.com /errata/RHSA-2016-2809.html · vendor-advisory, x_refsource_REDHAT, x_transferred
- nvd.nist.gov /vuln/detail/CVE-2016-8638 · advisory
- github.com /ipsilon-project/ipsilon/commit/1c48414877fc110652b6078a29529972c7ec9122 · web
- github.com /ipsilon-project/ipsilon/commit/64fc366c054fc6af1d9d2692902db169884b5f78 · web
- github.com /ipsilon-project/ipsilon/commit/a33303b6beb5c316d7c18b23566b7666a4e307a4 · web
- github.com /ipsilon-project/ipsilon/commit/b4744a92d4fa7f6d7ade0ae2d99a2dc0ea94734d · web
- access.redhat.com /errata/RHSA-2016:2809 · web
- access.redhat.com /security/cve/CVE-2016-8638 · web
- bugzilla.redhat.com /show_bug.cgi?id=1392829 · web
- github.com /advisories/GHSA-376m-3rm2-9jm6 · advisory
- github.com /ipsilon-project/ipsilon · package
- github.com /pypa/advisory-database/tree/main/vulns/ipsilon/PYSEC-2026-360.yaml · web
- pypi.org /project/ipsilon · web
Sources
- CVE List: CVE-2016-8638
- GitHub Advisory: GHSA-376m-3rm2-9jm6
- NVD: CVE-2016-8638
- OSV: PYSEC-2026-360
vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.