Security Digest · Vulnerability record
CVE-2024-25718: Samly access control vulnerability
In the Samly package before 1.4.0 for Elixir, Samly.State.Store.getassertion/3 can return an expired session, which interferes with access control because Samly.AuthHandler uses a cached session and does not replace it, even after expiry.
CVSS 9.3 Critical EPSS 0.7% · p51
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.7%, percentile 51: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 51% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes
Samly(Hex (Erlang/Elixir)) < 1.4.0, fixed in 1.4.0. Check your lockfile, including transitive dependencies.
What it is
In the Samly package before 1.4.0 for Elixir, Samly.State.Store.getassertion/3 can return an expired session, which interferes with access control because Samly.AuthHandler uses a cached session and does not replace it, even after expiry.
From the GitHub advisory
In the Samly package before 1.4.0 for Elixir, Samly.State.Store.getassertion/3 can return an expired session, which interferes with access control because Samly.AuthHandler uses a cached session and does not replace it, even after expiry.
Weakness type: CWE-400, CWE-613.
Product: Samly (Hex (Erlang/Elixir)) · Assigned by: mitre · Published: 2024-02-11
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| Hex (Erlang/Elixir) | Samly | < 1.4.0 | 1.4.0 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| n/a | n/a | see vendor advisory |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| GitHub | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Attack requirements: none
- Privileges required: none (no login)
- User interaction: none
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 0.66% probability of exploitation activity in the next 30 days; percentile 51.
Timeline
- — CVE record published by mitre
- — GitHub-reviewed advisory GHSA-h3rw-77w7-92gf published (critical)
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-h3rw-77w7-92gf github.com
- CVE.org record CVE-2024-25718 cve.org
- NVD entry CVE-2024-25718 nvd.nist.gov
Other references from the CVE record and advisory
- hex.pm hex.pm
- github.com github.com
- github.com github.com
- diff.hex.pm diff.hex.pm
- github.com github.com
- github.com github.com
- github.com github.com
Critical Hex (Erlang/Elixir) advisories · Today’s Security Digest