CVE-2009-4142 Details
The htmlspecialchars function in PHP before 5.2.12 does not properly handle (1) overlong UTF-8 sequences, (2) invalid Shift_JIS sequences, and (3) invalid EUC-JP sequences, which allows remote attackers to conduct cross-site scripting (XSS) attacks by placing a crafted byte sequence before a special character.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2009-4142
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
6.5 Probability of exploitation activity being observed over the next 30 days (93rd percentile)
CVSS score for CVE-2009-4142
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
4.3 Medium
Products affected by CVE-2009-4142
php 4.1.1
php 4.1.2
php 4.1.3
php 4.2.0
php 4.2.1
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Not available
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CVE-2009-4142 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 62,532 21.48%
FR 45,704 15.70%
DE 39,091 13.43%
KR 23,333 8.02%
TW 20,358 6.99%
JP 19,284 6.62%
IT 9,723 3.34%
RU 6,794 2.33%
CA 6,569 2.26%
NL 5,083 1.75%

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CVE-2009-4142 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Telecommunications 123,313 62.86%
Technology 66,168 33.73%
Education 1,219 0.62%
Real Estate 1,057 0.54%
Utilities 931 0.47%
Media/Entertainment 837 0.43%
Business Services 584 0.30%
Government/Politics 539 0.27%
Consumer Goods 391 0.20%
Retail 243 0.12%

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