How severe is GHSA-jmgw-6vjg-jjwg?

No CVSS score has been assigned to GHSA-jmgw-6vjg-jjwg yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-jmgw-6vjg-jjwg?

GHSA-jmgw-6vjg-jjwg affects the following packages: actionpack (RubyGems), actionpack (RubyGems), actionpack (RubyGems), actionpack (RubyGems). Ecosystems affected: RubyGems.

How do I fix GHSA-jmgw-6vjg-jjwg?

Update actionpack to version 2.3.15 or later. Run your dependency manager's update command and verify no transitive dependencies pin the vulnerable version. Use O3 Security's SCA scanner to confirm the fix is applied across your entire dependency tree.

Is GHSA-jmgw-6vjg-jjwg actively exploited in the wild?

Yes. There are 7 known exploit references for GHSA-jmgw-6vjg-jjwg, including 2 documented proof-of-concept exploits on Exploit-DB and 4 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for GHSA-jmgw-6vjg-jjwg?

GHSA-jmgw-6vjg-jjwg has an EPSS (Exploit Prediction Scoring System) score of 91.9%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

What type of vulnerability is GHSA-jmgw-6vjg-jjwg?

GHSA-jmgw-6vjg-jjwg is classified as Improper Input Validation (CWE-20). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-jmgw-6vjg-jjwg published, and has it been updated?

GHSA-jmgw-6vjg-jjwg was published on October 24, 2017 and was last updated on November 30, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

💎 RubyGems

GHSA-jmgw-6vjg-jjwg

actionpack Improper Input Validation vulnerability

Also known asCVE-2013-0156

Published

Oct 24, 2017

Updated

Nov 30, 2024

Affected

4 pkgs

Patched

4 / 4

Exploits

7 known

EPSS Exploitation Probability

via FIRST.org ↗

91.9%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

4 pkgs affected

💎actionpack💎actionpack💎actionpack💎actionpack

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.

Description

active_support/core_ext/hash/conversions.rb in Ruby on Rails before 2.3.15, 3.0.x before 3.0.19, 3.1.x before 3.1.10, and 3.2.x before 3.2.11 does not properly restrict casts of string values, which allows remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU consumption) involving nested XML entity references, by leveraging Action Pack support for (1) YAML type conversion or (2) Symbol type conversion.

Affected Packages

4 total 4 fixed

Ecosystem	Package	Vulnerable range	Fix
💎RubyGems	`actionpack`	all versions	2.3.15
💎RubyGems	`actionpack`	≥ 3.0.0&&< 3.0.19	3.0.19
💎RubyGems	`actionpack`	≥ 3.1.0&&< 3.1.10	3.1.10
💎RubyGems	`actionpack`	≥ 3.2.0&&< 3.2.11	3.2.11

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-24019remotemultiple✓ Verified

Ruby on Rails - XML Processor YAML Deserialization Code Execution (Metasploit)

by Metasploit · Jan 10, 2013

Exploit-DB Source

EDB-27527remotemultiple✓ Verified

Ruby on Rails - Known Secret Session Cookie Remote Code Execution (Metasploit)

by Metasploit · Aug 12, 2013

Exploit-DB Source

Frequently Asked Questions

`active_support/core_ext/hash/conversions.rb` in Ruby on Rails before 2.3.15, 3.0.x before 3.0.19, 3.1.x before 3.1.10, and 3.2.x before 3.2.11 does not properly restrict casts of string values, which allows remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU consumption) involving nested XML entity references, by leveraging Action Pack support for (1) YAML type conversion or (2) Symbol type conversion.

O3 Security · Impact-Aware SCA

Is GHSA-jmgw-6vjg-jjwg in your stack?

O3 detects GHSA-jmgw-6vjg-jjwg across RubyGems dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works