5

CVE-2013-1821: ruby-lang ruby Improper Input Validation

Modified
AliasesRHSA-2013:0611GHSA-hgg7-cghq-xhf4
Published 09-04-2013Last modified 06-08-2024

Vulnerability summary

CVE-2013-1821 is a medium (CVSS 5.0) Improper Input Validation vulnerability in ruby-lang ruby. EPSS estimates a 6.86% chance of exploitation in the next 30 days, higher than 94% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.0/10
010
Medium · v2.0 (NVD)
EPSS score
6.86%
0%100%
Low · +0.13 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6
DSA-2738-1DSA-2809-1RHSA-2013:0612RHSA-2026:7305RHSA-2026:7307RHSA-2026:8838

Timeline

  1. 09-04-2013
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

lib/rexml/text.rb in the REXML parser in Ruby before 1.9.3-p392 allows remote attackers to cause a denial of service (memory consumption and crash) via crafted text nodes in an XML document, aka an XML Entity Expansion (XEE) attack.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

6.86%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

Increase +0.13 pp

From 6.73% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.

Redhat10 products
  • ruby< 0:1.8.5-29.el5_9
  • ruby-debuginfo< 0:1.8.5-29.el5_9
  • ruby-devel< 0:1.8.5-29.el5_9
  • ruby-docs< 0:1.8.5-29.el5_9
  • ruby-irb< 0:1.8.5-29.el5_9
Org.jruby1 product
  • jruby< 1.7.3
Ruby-lang1 product
  • rubyEOL≤ 1.9.3 | 1.9 | 1.9.1 | 1.9.2 | 1.9.3 | 1.9.3:p0 | 1.9.3:p125 | 1.9.3:p194 | 1.9.3:p286 | 1.9.3:p383 | 2.0 | 2.0.0 | 2.0.0:rc1 | 2.0.0:rc2

3 vendors · 12 products

References

32 links
Show all 32 references