9.1

CVE-2015-1555: zend zend_framework Improper Input Validation

CVSS: 9.1v3.0CriticalModified
Published 07-08-2017Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2015-1555 is a critical (CVSS 9.1) Improper Input Validation vulnerability in zend zend_framework. EPSS estimates a 1.39% chance of exploitation in the next 30 days, higher than 72.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.0 (NVD)
EPSS score
1.39%
0%100%
Low · +0.16 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 07-08-2017
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

Zend/Session/SessionManager in Zend Framework 2.2.x before 2.2.9, 2.3.x before 2.3.4 allows remote attackers to create valid sessions without using session validators.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.39%

Chance of exploitation in the next 30 days

Percentile

72%

Versus all other CVEs

30-day change

+0.16 pp

From 1.23% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.39%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Zend1 product
  • zend_framework2.2.0 | 2.2.1 | 2.2.2 | 2.2.3 | 2.2.4 | 2.2.5 | 2.2.6 | 2.2.7 | 2.2.8 | 2.3.0 | 2.3.1 | 2.3.2 | 2.3.3

1 vendor · 1 product

References

1 links