CVE Watchtower

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CVE-2013-0156NVD

Vulnerability Summary

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.
Severity Level
UNKNOWN
Published Date
Jan 13, 2013
Last Modified
Apr 29, 2026
PoC
Available(Metasploit)
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
91.91%Probability
Root Weakness (CWE)
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required.

Affected & Patched Versions

Affected Versions
  • Rubyonrails Rails >= 3.2.0 and < 3.2.11
  • Rubyonrails Ruby On Rails < 2.3.15
  • Rubyonrails Ruby On Rails >= 3.0.0 and < 3.0.19
  • Rubyonrails Ruby On Rails >= 3.1.0 and < 3.1.10
  • Debian Debian Linux
Patched Versions
  • Rubyonrails Rails 3.2.11
  • Rubyonrails Ruby On Rails 2.3.15
  • Rubyonrails Ruby On Rails 3.0.19
  • Rubyonrails Ruby On Rails 3.1.10
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🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References