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October CVE-2017-1000195

HIGH
Deserialization of Untrusted Data (CWE-502)
2017-11-17 cve@mitre.org
7.5
CVSS 3.0 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A08:2025 - Software or Data Integrity Failures
ASVS 5.0
V1 - Encoding and Sanitization Safe deserialization, type allowlists
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.18%.

Exploit ScenarioDerived

A remote attacker could execute arbitrary code through malicious serialized objects by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAI

October CMS build 412 is vulnerable to PHP object injection in asset move functionality resulting in ability to delete files limited by file permissions on the server. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Avoid deserializing untrusted data. Use safe serialization formats (JSON). Implement integrity checks and type allowlists.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Deserialization of Untrusted Data (CWE-502), which allows attackers to execute arbitrary code through malicious serialized objects. October CMS build 412 is vulnerable to PHP object injection in asset move functionality resulting in ability to delete files limited by file permissions on the server. Affected products include: Octobercms October.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

DescriptionCVE.org

October CMS build 412 is vulnerable to PHP object injection in asset move functionality resulting in ability to delete files limited by file permissions on the server.

Threat Intelligence Overview

EPSS Score
0.2%
Top 60% exploitable
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Insecure deserialization occurs when an application converts serialized data (a stream of bytes representing an object's state) back into a living object without proper validation.

Affected Products (CPE)CVE.org

cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:*
CVE-2017-1000119 HIGH POC
7.2 Oct 05

October CMS build 412 is vulnerable to PHP code execution in the file upload functionality resulting in site compromise

CVE-2021-3311 CRITICAL POC
9.8 Feb 05

An issue was discovered in October through build 471. Rated critical severity (CVSS 9.8), this vulnerability is remotely

CVE-2021-32648 CRITICAL POC
9.1 Aug 26

octobercms in a CMS platform based on the Laravel PHP Framework. Rated critical severity (CVSS 9.1), this vulnerability

CVE-2017-16244 HIGH POC
8.8 Nov 01

Cross-Site Request Forgery exists in OctoberCMS 1.0.426 (aka Build 426) due to improper validation of CSRF tokens for po

CVE-2022-21705 HIGH POC
7.2 Feb 23

Octobercms is a self-hosted CMS platform based on the Laravel PHP Framework. Rated high severity (CVSS 7.2), this vulner

CVE-2018-7198 MEDIUM POC
6.1 Feb 18

October CMS through 1.0.431 allows XSS by entering HTML on the Add Posts page. Rated medium severity (CVSS 6.1), this vu

CVE-2017-1000196 CRITICAL
9.8 Nov 17

October CMS build 412 is vulnerable to PHP code execution in the asset manager functionality resulting in site compromis

CVE-2017-1000197 CRITICAL
9.8 Nov 17

October CMS build 412 is vulnerable to file path modification in asset move functionality resulting in creating creating

CVE-2017-1000194 CRITICAL
9.8 Nov 17

October CMS build 412 is vulnerable to Apache configuration modification via file upload functionality resulting in site

CVE-2017-15284 MEDIUM POC
5.4 Oct 12

Cross-Site Scripting exists in OctoberCMS 1.0.425 (aka Build 425), allowing a least privileged user to upload an SVG fil

CVE-2015-5613 MEDIUM POC
5.4 Sep 28

Cross-site scripting (XSS) vulnerability in October CMS build 271 and earlier allows remote attackers to inject arbitrar

CVE-2023-43876 MEDIUM POC
5.4 Sep 28

A Cross-Site Scripting (XSS) vulnerability in installation of October v.3.4.16 allows an attacker to execute arbitrary w

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