Skip to main content

Sinema Server CVE-2023-35796

CRITICAL
Cross-site Scripting (XSS) (CWE-79)
2023-10-10 productcert@siemens.com
9.0
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

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

Impact

CVSS score of 9.0 (CRITICAL). Attack characteristics: network attack vector, low complexity, low privileges required, user interaction required.

Exploit ScenarioDerived

A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 0.6% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

A vulnerability has been identified in SINEMA Server V14 (All versions). Rated critical severity (CVSS 9.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

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 Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. A vulnerability has been identified in SINEMA Server V14 (All versions). The affected application improperly sanitizes certain SNMP configuration data retrieved from monitored devices. An attacker with access to a monitored device could perform a stored cross-site scripting (XSS) attack that may lead to arbitrary code execution with SYSTEM privileges on the application server. (ZDI-CAN-19823) Affected products include: Siemens Sinema Server.

Know when Sinema Server gets its next vulnerability

  • Watch products and get an email when something new is published
  • Check this CVE against your own stack and servers
  • Exploit and PoC references, threat intelligence from 22 sources

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 9.0 CRITICAL
AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

A vulnerability has been identified in SINEMA Server V14 (All versions). The affected application improperly sanitizes certain SNMP configuration data retrieved from monitored devices. An attacker with access to a monitored device could perform a stored cross-site scripting (XSS) attack that may lead to arbitrary code execution with SYSTEM privileges on the application server. (ZDI-CAN-19823)

Threat Intelligence Overview

EPSS Score
0.6%
Top 56% exploitable
Data Quality
2 sources
Confidence: Low

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 CRITICAL
CISA KEV No
Public POC No
EPSS 0.6%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
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
No
Human Impact· derived
Medium

Priority Score

46
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +45
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:a:siemens:sinema_server:14.0:*:*:*:*:*:*:*
CVE-2021-40438 CRITICAL POC
9.0 Sep 16

A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user.4.4

CVE-2021-3449 MEDIUM
5.9 Mar 25

An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. Rated med

CVE-2021-39275 CRITICAL
9.8 Sep 16

ap_escape_quotes() may write beyond the end of a buffer when given malicious input. Rated critical severity (CVSS 9.8),

CVE-2014-2731 CRITICAL
9.3 Apr 19

Multiple unspecified vulnerabilities in the integrated web server in Siemens SINEMA Server before 12 SP1 allow remote at

CVE-2016-6486 HIGH
7.8 Aug 08

Siemens SINEMA Server uses weak permissions for the application folder, which allows local users to gain privileges via

CVE-2019-6575 HIGH
7.5 Apr 17

A vulnerability has been identified in SIMATIC CP 443-1 OPC UA (All versions), SIMATIC ET 200SP Open Controller CPU 1515

CVE-2021-34798 HIGH
7.5 Sep 16

Malformed requests may cause the server to dereference a NULL pointer.4.48 and earlier. Rated high severity (CVSS 7.5),

CVE-2022-25311 HIGH
7.3 Mar 08

A vulnerability has been identified in SINEC NMS (All versions >= V1.0.3 < V2.0), SINEC NMS (All versions < V1.0.3), SIN

CVE-2020-7580 MEDIUM
6.7 Jun 10

A vulnerability has been identified in SIMATIC Automation Tool (All versions < V4 SP2), SIMATIC NET PC Software V14 (All

CVE-2017-6865 MEDIUM
6.5 May 11

A vulnerability has been identified in Primary Setup Tool (PST) (All versions < V4.2 HF1), SIMATIC Automation Tool (All

CVE-2016-7165 MEDIUM
6.4 Nov 15

A vulnerability has been identified in Primary Setup Tool (PST) (All versions < V4.2 HF1), SIMATIC IT Production Suite (

CVE-2014-2733 MEDIUM
5.0 Apr 19

Siemens SINEMA Server before 12 SP1 allows remote attackers to cause a denial of service (web-interface outage) via craf

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy