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CVE-2015-5161

30
FAUCET Score

CVE-2015-5161 is a critical vulnerability affecting ZendXml and Zend Framework versions prior to 1.12.14, 2.4.6, and 2.5.2, specifically when operating with PHP-FPM in a threaded environment. This flaw allows remote attackers to bypass security checks through multibyte encoded characters, leading to XML External Entity (XXE) and XML Entity Expansion (XEE) attacks. With a CVSS score of 6.8 (medium severity) and a FAUCET Risk Score of 97/100, its impact includes potential compromise of confidentiality, integrity, and availability. While not listed on CISA's KEV catalog, exploit code is publicly available on ExploitDB, indicating a potential for exploitation, despite minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.0CPE matchmatch criteria
cpe:2.3:a:zend:zend_framework:1.0.0:*:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:zend:zend_framework:1.0.0:rc1:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:zend:zend_framework:1.0.0:rc2:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:zend:zend_framework:1.0.0:rc2a:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:zend:zend_framework:1.0.0:rc3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
9.91%
Probability of exploitation in next 30 days
EPSS Percentile
95.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-38573 · Oct 30, 2015
This CVE's current EPSS score of 0.0991 is in the 95th percentile among its peer group of 19,955 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

composerpatch availablevia ghsa
Product: zendframework/zendframeworkFixed in: 2.4.6
composerpatch availablevia ghsa
Product: zendframework/zendframeworkFixed in: 2.5.2
composerpatch availablevia ghsa
Product: zendframework/zendframework1Fixed in: 1.12.14
composerpatch availablevia ghsa
Product: zendframework/zendxmlFixed in: 1.0.1
composerpatch availablevia ghsa
Product: zendframework/zendframeworkFixed in: 1.12.14

Vendor Advisories (1)

composerGHSA-xp8p-9rq5-4wgvmedium

ZendXml and Zend Framework contain XXE and XEE Vulnerabilities

May 17, 2022

References

framework.zend.com / security/advisory/ZF2015-06
Vendor Advisory
legalhackers.com / advisories/zend-framework-XXE-vuln.txt
Exploit
lists.fedoraproject.org / pipermail/package-announce/2015-August/164409.html
lists.fedoraproject.org / pipermail/package-announce/2015-August/165147.html
lists.fedoraproject.org / pipermail/package-announce/2015-August/165173.html
packetstormsecurity.com / files/133068/Zend-Framework-2.4.2-1.12.13-XXE-Injection.html
Exploit
seclists.org / fulldisclosure/2015/Aug/46
Exploit
exploit-db.com / exploits/37765
Exploit
debian.org / security/2015/dsa-3340
securityfocus.com / bid/76177
Exploit