Versions of the package hackney before 1.21.0 are vulnerable to Server-side Request Forgery (SSRF) due to improper parsing of URLs by URI built-in module and hackey. Given the URL http://[email protected]/, the URI function will parse and see the host as 127.0.0.1 (which is correct), and hackney will refer the host as 127.2.2.2/. This vulnerability can be exploited when users rely on the URL function for host checking.
CVE-2025-1211
This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 90% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.5
- EG Score
- 6.5(medium)
- EPSS
- 39.4%
- KEV
- Not listed
Published
February 11, 2025
Last Modified
April 29, 2026
References (5)
- report@snykhttps://gist.github.com/snoopysecurity/996de09ec0cfd0ebdcfdda8ff515deb1
- report@snykhttps://github.com/benoitc/hackney/commit/9594ce58fabd32cd897fc28fae937694515a3d4a
- report@snykhttps://security.snyk.io/vuln/SNYK-HEX-HACKNEY-6516131
- report@snykhttps://www.blackhat.com/docs/us-17/thursday/us-17-Tsai-A-New-Era-Of-SSRF-Exploiting-URL-Parser-In-Trending-Programming-Languages.pdf
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://gist.github.com/snoopysecurity/996de09ec0cfd0ebdcfdda8ff515deb1
Vendor Advisories for CVE-2025-1211(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
Hex(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| hackney | 0.13.1 ... 1.9.0 (75 versions) | 1.21.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 43× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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Related CVEs(same CWE)
Same CWE
10 shownCWE-918
Frequently asked(5)
What is CVE-2025-1211?
When was CVE-2025-1211 disclosed?
Is CVE-2025-1211 actively exploited?
What is the CVSS score of CVE-2025-1211?
How do I remediate CVE-2025-1211?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-1211
Is Your Infrastructure Affected by CVE-2025-1211?
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