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CVE-2015-7503

19
FAUCET Score

CVE-2015-7503 describes a padding oracle vulnerability in Zend Framework versions before 2.4.9, zend-framework/zend-crypt 2.4.x before 2.4.9, and 2.5.x before 2.5.2, which allows remote attackers to recover RSA private keys. This vulnerability carries a CVSS v3 score of 7.5 (High), indicating a network-based attack with low complexity that can lead to high confidentiality impact. Despite its severity, there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion, with only one Reddit mention.

Impacted Technologies

VendorProductVersion(s)CPE
2.4.0CPE matchmatch criteria
cpe:2.3:a:zend:zend_framework:2.4.0:*:*:*:*:*:*:*
2.4.1CPE matchmatch criteria
cpe:2.3:a:zend:zend_framework:2.4.1:*:*:*:*:*:*:*
2.4.2CPE matchmatch criteria
cpe:2.3:a:zend:zend_framework:2.4.2:*:*:*:*:*:*:*
2.4.3CPE matchmatch criteria
cpe:2.3:a:zend:zend_framework:2.4.3:*:*:*:*:*:*:*
2.4.4CPE matchmatch criteria
cpe:2.3:a:zend:zend_framework:2.4.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.36%
Probability of exploitation in next 30 days
EPSS Percentile
68.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0136 is in the 49th percentile among its peer group of 51,553 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, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

composerpatch availablevia ghsa
Product: zendframework/zendframeworkFixed in: 2.5.2
composerpatch availablevia ghsa
Product: zendframework/zend-cryptFixed in: 2.4.9
composerpatch availablevia ghsa
Product: zendframework/zend-cryptFixed in: 2.5.2
composerpatch availablevia ghsa
Product: zendframework/zendframeworkFixed in: 2.4.9

Vendor Advisories (1)

composerGHSA-pm9m-w23q-5967high

Zend Framework Information Disclosure

May 17, 2022

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
framework.zend.com / security/advisory/ZF2015-10
Vendor Advisory