CVE-2019-12277: Blogifier.Core Blogifier Does Not Properly Restrict Vulnerability

CRITICAL
Advisory Identifier: GHSA-qcx4-gfh8-w5p5
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CVSS 9.8
CWE-22
Published
Advisory Summary

CVE-2019-12277 is a CRITICAL (CVSS 9.8) blogifier does not properly restrict vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Blogifier.Core libraries in the NuGet ecosystem. The issue involves blogifier does not properly restrict apis. Remediation is available by upgrading affected packages to version 2.5.5.

CVE-2019-12277 at a Glance

CVE Identifier CVE-2019-12277
GHSA Identifier GHSA-qcx4-gfh8-w5p5
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Blogifier.Core
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2019-12277

To remediate this vulnerability, upgrade all affected Blogifier.Core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Blogifier.Core fixed: 2.5.5 
Upgrade Blogifier.Core to 2.5.5
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for Blogifier.Core

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-12277, inspect your project dependencies for Blogifier.Core:

inspect dependencies for Blogifier.Core

Analyze the terminal output to locate any version of Blogifier.Core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.5.5), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Blogifier.Core, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Blogifier 2.3 before 2019-05-11 does not properly restrict APIs, as demonstrated by missing checks for `..` in a pathname. The issue is patched in the `2.4` branch, but `2.5.5` is the lowest available patched version on https://www.nuget.org/packages/Blogifier.Core.

CVE-2019-12277 Affected Blogifier.Core Versions

1 component(s)
Fixed Versions:
2.5.5
Product / Package Ecosystem Affected Versions Fixed Version
Blogifier.Core
nuget/Blogifier.Core
NuGet
< 2.5.5
2.5.5

References

NVD — CVE-2019-12277 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-12277
Security Fix Commit FIX COMMIT
https://github.com/blogifierdotnet/Blogifier/commit/3e2ae11f6be8aab82128f223c2916fab5a408be5
Blogifier.Core Source Repository REPOSITORY
https://github.com/blogifierdotnet/Blogifier

Frequently Asked Questions

What is CVE-2019-12277?
CVE-2019-12277 is a security vulnerability in Blogifier.Core involving Blogifier does not properly restrict APIs under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Blogifier.Core versions are affected?
Affected versions include releases prior to 2.5.5 across affected packages: Blogifier.Core.
What version fixes CVE-2019-12277?
Upgrading to 2.5.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Blogifier.Core affected?
Yes, Blogifier.Core is affected in releases prior to 2.5.5. Upgrade your dependency to 2.5.5 or later.
What is the CVSS score of CVE-2019-12277?
CVE-2019-12277 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2019-12277?
CVE-2019-12277 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check NuGet dependencies for CVE-2019-12277?
Run the dependency tree command: 'inspect dependencies for Blogifier.Core'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qcx4-gfh8-w5p5",
  "modified" : "2025-04-04T20:28:34Z",
  "published" : "2022-05-24T16:46:16Z",
  "aliases" : [ "CVE-2019-12277" ],
  "summary" : "Blogifier does not properly restrict APIs",
  "details" : "Blogifier 2.3 before 2019-05-11 does not properly restrict APIs, as demonstrated by missing checks for `..` in a pathname.\n\nThe issue is patched in the `2.4` branch, but `2.5.5` is the lowest available patched version on https://www.nuget.org/packages/Blogifier.Core.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Blogifier.Core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.5.5"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 2.4"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-12277"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/blogifierdotnet/Blogifier/commit/3e2ae11f6be8aab82128f223c2916fab5a408be5"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/blogifierdotnet/Blogifier"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-04-04T19:54:14Z",
    "nvd_published_at" : "2019-05-22T15:29:00Z"
  }
}