GHSA-hgg7-cghq-xhf4 · Severity: medium · Ecosystem: maven — Ruby vulnerable to denial of service
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.
Conclusion & alert: CVE-2013-1821 is rated Moderate Risk (47.5/100): CVSS Medium severity, with high exploitation likelihood (EPSS 6.62%, 93th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 25.73% | 6.62% | -19.11% |
| 2 | 2026-05-31 | 26.22% | 25.73% | -0.49% |
| 3 | 2026-05-18 | — | 26.22% | — |
Full EPSS history (22 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
GHSA-hgg7-cghq-xhf4 · Severity: medium · Ecosystem: maven — Ruby vulnerable to denial of service
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
normal | CVE-2013-1821: 1 GLSA(s) (201412-27), 1 atom(s) (dev-lang/ruby); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-1821 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2013-1821 |
ubuntu
|
medium | CVE-2013-1821 medium priority: Ubuntu including 2 source packages (ruby1.8, ruby1.9.1), 16 status rows across 8 suites (hardy, lucid, oneiric, precise, quantal, raring, saucy, upstream): released 10, ignored 3, not-affected 2, DNE 1. | https://ubuntu.com/security/CVE-2013-1821 |
: Per: http://www.ruby-lang.org/en/news/2013/02/22/rexml-dos-2013-02-22/ "Affected versions All ruby 1.9 versions prior to ruby 1.9.3 patchlevel 392 All ruby 2.0 versions prior to ruby 2.0.0 patchlevel 0 prior to trunk revision 39384"
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| ruby-lang | ruby | <= 1.9.3 | cpe:2.3:a:ruby-lang:ruby:*:p385:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9 | cpe:2.3:a:ruby-lang:ruby:1.9:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.1 | cpe:2.3:a:ruby-lang:ruby:1.9.1:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.2 | cpe:2.3:a:ruby-lang:ruby:1.9.2:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p0:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p125:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p194:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p286:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p383:*:*:*:*:*:* |
| ruby-lang | ruby | 2.0 | cpe:2.3:a:ruby-lang:ruby:2.0:*:*:*:*:*:*:* |
| ruby-lang | ruby | 2.0.0 | cpe:2.3:a:ruby-lang:ruby:2.0.0:*:*:*:*:*:*:* |
| ruby-lang | ruby | 2.0.0 | cpe:2.3:a:ruby-lang:ruby:2.0.0:rc1:*:*:*:*:*:* |
| ruby-lang | ruby | 2.0.0 | cpe:2.3:a:ruby-lang:ruby:2.0.0:rc2:*:*:*:*:*:* |