CVE-2017-17734

CRITICAL

CMS Made Simple (CMSMS) before 2.2.5 does not properly cache login information in sessions.

Affects 2 products across 1 vendor.

CVSS 3.09.8
EPSS1.1%
Percentile65th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-200: Exposure of Sensitive Information

Application reveals restricted data such as system internals, credentials, or user data to unauthorized actors.

Related Attack Patterns (CAPEC)
CAPEC-13 Subverting Environment Variable Values
via CWE-200
CAPEC-59 Session Credential Falsification through Prediction
via CWE-200
CAPEC-60 Reusing Session IDs (aka Session Replay)
via CWE-200
CAPEC-79 Using Slashes in Alternate Encoding
via CWE-200
CAPEC-285 ICMP Echo Request Ping
via CWE-200
Show all 59

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2017. A critical vulnerability affects Cmsmadesimple systems (CVE-2017-17734). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2017-GLOBAL-228931-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2017-17734?
This vulnerability was disclosed in 2017. A critical vulnerability affects Cmsmadesimple systems (CVE-2017-17734). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2017-17734?
CVE-2017-17734 has CVSS 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 1.1%.
Is CVE-2017-17734 actively exploited?
No confirmed active exploitation of CVE-2017-17734 as of 2026-09-25.
How do I remediate CVE-2017-17734?
Priority: MEDIUM. Advisory: https://forum.cmsmadesimple.org/viewtopic.php?f=1&t=77737
What systems are affected by CVE-2017-17734?
CVE-2017-17734 affects Cmsmadesimple Cms Made Simple.
Vulnerability Details
CVE IDCVE-2017-17734
BSIDBS-2017-GLOBAL-228931-C BreachSpider Global ID
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2017-12-18
Last Modified2026-06-17
ICS Relevance0%
Weakness (CWE)
Exposure of Sensitive Information
SourceNVD
Official Description

CMS Made Simple (CMSMS) before 2.2.5 does not properly cache login information in sessions.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: CMS Made Simple (CMSMS) before 2.2.5 does not properly cache login information in sessions. CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Exploitation Likelihood: LOW

Affected Products
VendorProductAffected Versions
Cmsmadesimple Cms Made Simple < 2.2.5
Remediation
View Vendor Advisory →

Remediation Priority: MEDIUM

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 3224 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hash36d4de7e0be848481dff815a15a9fd1aa5e6412d1e3558eaeff966fe83965f0a95ea3667e1a905751d25639f1aea9a1b65c25d835bba7c8cd28b3b8c7d479419
Related CVEs affecting Cmsmadesimple
CVE-2010-4663 10.0 Unspecified vulnerability in the News module in CMS Made Simple (CMSMS) befor... CVE-2017-16783 9.8 In CMS Made Simple 2.1.6, there is Server-Side Template Injection via the cnt... CVE-2017-17735 9.8 CMS Made Simple (CMSMS) before 2.2.5 does not properly cache login informatio... CVE-2017-6070 9.8 CMS Made Simple version 1.x Form Builder before version 0.8.1.6 allows remote... CVE-2017-1000453 9.8 CMS Made Simple version 2.1.6 and 2.2 are vulnerable to Smarty templating inj...
View all Cmsmadesimple CVEs →

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