Security Digest · Vulnerability record
CVE-2019-25211: Gin mishandles a wildcard at the end of an origin string
parseWildcardRules in Gin-Gonic CORS middleware before 1.6.0 mishandles a wildcard at the end of an origin string, e.g., https://example.community/ is allowed when the intention is that only https://example.com/ should be allowed, and http://localhost.example.com/ is allowed when the intention is that only…
CVSS 9.3 Critical EPSS 0.4% · p36
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 0.4%, percentile 36: FIRST’s model estimates a 0.4% chance of exploitation activity in the next 30 days, higher than 36% of all scored CVEs (low). 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
github.com/gin-gonic/gin(Go) < 1.6.0, fixed in 1.6.0;github.com/gin-contrib/cors(Go) < 1.6.0, fixed in 1.6.0. Check your lockfile, including transitive dependencies.
What it is
parseWildcardRules in Gin-Gonic CORS middleware before 1.6.0 mishandles a wildcard at the end of an origin string, e.g., https://example.community/ is allowed when the intention is that only https://example.com/ should be allowed, and http://localhost.example.com/ is allowed when the intention is that only http://localhost/ should be allowed.
From the GitHub advisory
parseWildcardRules in Gin-Gonic CORS middleware before 1.6.0 mishandles a wildcard at the end of an origin string, e.g., https://example.community/ is allowed when the intention is that only https://example.com/ should be allowed, and http://localhost.example.com/ is allowed when the intention is that only http://localhost/ should be allowed.
Weakness type: CWE-346.
Product: github.com/gin-gonic/gin (Go) · Assigned by: mitre · Published: 2024-06-28
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| Go | github.com/gin-gonic/gin | < 1.6.0 | 1.6.0 |
| Go | github.com/gin-contrib/cors | < 1.6.0 | 1.6.0 |
| 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): 0.43% probability of exploitation activity in the next 30 days; percentile 36.
Timeline
- — CVE record published by mitre
- — GitHub-reviewed advisory GHSA-869c-j7wc-8jqv 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-869c-j7wc-8jqv github.com
- CVE.org record CVE-2019-25211 cve.org
- NVD entry CVE-2019-25211 nvd.nist.gov
Other references from the CVE record and advisory
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
- lists.debian.org lists.debian.org