Siemens SIMATIC: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) (CVE-2019-6577)
Published Sources: CVE.org
What is affected, what to do
A vulnerability has been identified in SIMATIC HMI Comfort Panels 4" - 22" (All versions < V15.1 Update 1), SIMATIC HMI Comfort Outdoor Panels 7" & 15" (All versions < V15.1 Update 1), SIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 und KTP900F (All versions < V15.1 Update 1), SIMATIC WinCC Runtime Advanced (All versions < V15.1 Update 1), SIMATIC WinCC Runtime Professional (All versions < V15.1 Update 1), SIMATIC WinCC (TIA Portal) (All versions < V15.1 Update 1), SIMATIC HMI Classic Devices (TP/MP/OP/MP Mobile Panel) (All versions). The integrated web server could allow Cross-Site Scripting (XSS) attacks if an attacker is able to modify particular parts of the device configuration via SNMP.
Update simatic_wincc_\(tia_portal\) to version 15.1, simatic_wincc_runtime to version 15.1.
- Affected
- Siemens SIMATIC HMI Comfort Panels 4" - 22"
eq All versions < V15.1 Update 1..All versions < V15.1 Update 1 - Siemens SIMATIC HMI Comfort Outdoor Panels 7" & 15"
eq All versions < V15.1 Update 1..All versions < V15.1 Update 1 - Siemens SIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 und KTP900F
eq All versions < V15.1 Update 1..All versions < V15.1 Update 1 - Siemens SIMATIC WinCC Runtime Advanced
eq All versions < V15.1 Update 1..All versions < V15.1 Update 1 - Siemens SIMATIC WinCC Runtime Professional
eq All versions < V15.1 Update 1..All versions < V15.1 Update 1 - Siemens SIMATIC WinCC (TIA Portal)
eq All versions < V15.1 Update 1..All versions < V15.1 Update 1 - Siemens SIMATIC HMI Classic Devices (TP/MP/OP/MP Mobile Panel)
eq All versions..All versions
- Siemens SIMATIC HMI Comfort Panels 4" - 22"
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Metrics
5.4
Priority
XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.
Source: NVD, CVSS v3
5.4
CVSS v3
Severity Medium on the scale from 0 to 10.
Source: CVE.org
0.9 %
EPSS score
Low — model estimates < 1% exploitation likelihood.
Source: FIRST EPSS, percentile 59.0
Show all metrics
- Severity
- Medium
Priority (0–325)
The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?
Read in glossary- 54.81 Methodology
Exploit maturity
An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.
Read in glossary- no public PoC known
XIEM Effective CVSS
XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.
Read in glossary- 5.4 Methodology
CVSS v3
CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.
Read in glossary- 5.4
EPSS score
The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.
Read in glossary- 0.9 %
- Low — model estimates < 1% exploitation likelihood.
EPSS percentile
The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.
Read in glossary- 59.0
- High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status
The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.
Read in glossary- —
- Published
CWE
CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.
Read in glossary- CWE-80
Detection rules
No NEOSEC detection rule is available for this vulnerability yet.
Classification under NIS2 and CRA
Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.
NIS2
NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.
Read in glossary- Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
CRA
The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.
Read in glossary- From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001
ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.
Read in glossary- Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.
Description
A vulnerability has been identified in SIMATIC HMI Comfort Panels 4" - 22" (All versions < V15.1 Update 1), SIMATIC HMI Comfort Outdoor Panels 7" & 15" (All versions < V15.1 Update 1), SIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 und KTP900F (All versions < V15.1 Update 1), SIMATIC WinCC Runtime Advanced (All versions < V15.1 Update 1), SIMATIC WinCC Runtime Professional (All versions < V15.1 Update 1), SIMATIC WinCC (TIA Portal) (All versions < V15.1 Update 1), SIMATIC HMI Classic Devices (TP/MP/OP/MP Mobile Panel) (All versions). The integrated web server could allow Cross-Site Scripting (XSS) attacks if an attacker is able to modify particular parts of the device configuration via SNMP. The security vulnerability could be exploited by an attacker with network access to the affected system. Successful exploitation requires system privileges and user interaction. An attacker could use the vulnerability to compromise confidentiality and the integrity of the affected system. At the stage of publishing this security advisory no public exploitation is known.
Source: cvelistv5, NVD (NIST)
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| Siemens AG | SIMATIC HMI Classic Devices (TP/MP/OP/MP Mobile Panel) |
|
|
| Siemens AG | SIMATIC HMI Comfort Outdoor Panels 7" & 15" |
|
|
| Siemens AG | SIMATIC HMI Comfort Panels 4" - 22" |
|
|
| Siemens AG | SIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 und KTP900F |
|
|
| Siemens AG | SIMATIC WinCC (TIA Portal) |
|
|
| Siemens AG | SIMATIC WinCC Runtime Advanced |
|
|
| Siemens AG | SIMATIC WinCC Runtime Professional |
|
|
| siemens | simatic_wincc_\(tia_portal\) |
|
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| siemens | simatic_wincc_runtime |
|
|
Vendors and products
- Siemens Siemens SIMATIC HMI Comfort Outdoor Panels Firmware
- Siemens Siemens SIMATIC HMI Comfort Panels Firmware
- Siemens Siemens SIMATIC HMI KTP Mobile Panels Ktp400f Firmware
- Siemens Siemens SIMATIC HMI KTP Mobile Panels Ktp700f Firmware
- Siemens Siemens SIMATIC HMI KTP Mobile Panels Ktp700 Firmware
- Siemens Siemens SIMATIC HMI KTP Mobile Panels Ktp900f Firmware
- Siemens Siemens SIMATIC HMI KTP Mobile Panels Ktp900 Firmware
- Siemens Siemens SIMATIC HMI MP Firmware
- Siemens Siemens SIMATIC HMI OP Firmware
- Siemens Siemens SIMATIC HMI TP Firmware
- Siemens Siemens Simatic Wincc Runtime
- Siemens Simatic Wincc \(tia Portal\)
Affected operating systems
| Other | siemens | simatic_hmi_comfort_outdoor_panels_firmware | — |
| Other | siemens | simatic_hmi_comfort_panels_firmware | — |
| Other | siemens | simatic_hmi_ktp_mobile_panels_ktp400f_firmware | — |
| Other | siemens | simatic_hmi_ktp_mobile_panels_ktp700_firmware | — |
| Other | siemens | simatic_hmi_ktp_mobile_panels_ktp700f_firmware | — |
| Other | siemens | simatic_hmi_ktp_mobile_panels_ktp900_firmware | — |
| Other | siemens | simatic_hmi_ktp_mobile_panels_ktp900f_firmware | — |
| Other | siemens | simatic_hmi_mp_firmware | — |
| Other | siemens | simatic_hmi_op_firmware | — |
| Other | siemens | simatic_hmi_tp_firmware | — |
Weakness classes (CWE)
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Variant
The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.
Entry at MITRE CWE-80
References & sources
- Siemens ProductCERTproductcert/pdf/ssa-804486.pdfx_refsource_MISC, Vendor advisory
- securityfocus.com108412Vulnerability database, x_refsource_BID
- us-cert.govics/advisories/ICSA-19-134-09x_refsource_MISC
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<a href="https://intel.neosec.eu/en/cve/CVE-2019-6577"><img src="https://intel.neosec.eu/badge/cve/CVE-2019-6577.svg?lang=en" alt="CVE-2019-6577 – NEOSEC Intel" height="20"></a>