What is the CVSS score of CVE-2021-22706?

CVE-2021-22706 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.8%.

Evlink City Evc1S22P4 Firmware CVE-2021-22706

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2021-07-21 cybersecurity@se.com

XSS Schneider Electric Evlink City Evc1S22P4 Firmware Evlink City Evc1S7P4 Firmware Evlink Parking Evw2 Firmware Evlink Parking Evf2 Firmware Evlink Parking Ev 2 Firmware Evlink Smart Wallbox Evb1A Firmware

6.1

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-79 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. Sign in to read
Impact	CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no 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. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.8% exploitation probability (EPSS)

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AnalysisAI

A CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.0.1), EVlink. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, 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 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.0.1), EVlink Parking (EVW2 / EVF2 / EV.2 all versions prior to R8 V3.4.0.1), and EVlink Smart Wallbox (EVB1A all versions prior to R8 V3.4.0.1 ) that could allow an attacker to impersonate the user who manages the charging station or carry out actions on their behalf when crafted malicious parameters are submitted to the charging station web server. Affected products include: Schneider-Electric Evlink City Evc1S22P4 Firmware, Schneider-Electric Evlink City Evc1S7P4 Firmware, Schneider-Electric Evlink Parking Evw2 Firmware, Schneider-Electric Evlink Parking Evf2 Firmware, Schneider-Electric Evlink Parking Ev.2 Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

DescriptionNVD

A CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.0.1), EVlink Parking (EVW2 / EVF2 / EV.2 all versions prior to R8 V3.4.0.1), and EVlink Smart Wallbox (EVB1A all versions prior to R8 V3.4.0.1 ) that could allow an attacker to impersonate the user who manages the charging station or carry out actions on their behalf when crafted malicious parameters are submitted to the charging station web server.

Threat Intelligence Overview

EPSS Score

0.8%

Top 49% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

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 MEDIUM

CISA KEV No

Public POC No

EPSS 0.8%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

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

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +30

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Cross-Site Scripting MEDIUM

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

Affected Products (CPE)NVD

cpe:2.3:o:schneider-electric:evlink_city_evc1s22p4_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:evlink_city_evc1s7p4_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:evlink_parking_evw2_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:evlink_parking_evf2_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:evlink_parking_ev.2_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:evlink_smart_wallbox_evb1a_firmware:*:*:*:*:*:*:*:*

More in Evlink City Evc1S22P4 Firmware

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CVE-2021-22707 CRITICAL Act Now POC

9.8 Jul 21

A CWE-798: Use of Hard-coded Credentials vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to

CVE-2021-22730 CRITICAL Act Now

9.8 Jul 21

A CWE-798: Use of Hard-coded Credentials vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to

CVE-2021-22729 CRITICAL Act Now

9.8 Jul 21

A CWE-259: Use of Hard-coded Password vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8

CVE-2021-22727 CRITICAL Act Now

9.8 Jul 21

A CWE-331: Insufficient Entropy vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.

CVE-2021-22726 HIGH This Week

8.1 Jul 21

A CWE-918: Server-Side Request Forgery (SSRF) vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions pri

CVE-2021-22774 HIGH This Week

7.5 Jul 21

A CWE-759: Use of a One-Way Hash without a Salt vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions p

CVE-2021-22708 HIGH This Week

7.2 Jul 21

A CWE-347: Improper Verification of Cryptographic Signature vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 al

CVE-2021-22773 MEDIUM This Month

6.5 Jul 21

A CWE-620: Unverified Password Change vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8

CVE-2021-22728 MEDIUM This Month

6.5 Jul 21

A CWE-200: Information Exposure vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.

CVE-2021-22723 MEDIUM This Month

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A CWE-79: Improper Neutralization of Input During Web Page Generation (Cross-siteScripting) through Cross-Site Request F

CVE-2021-22722 MEDIUM This Month

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A CWE-79: Improper Neutralization of Input During Web Page Generation ('Stored Cross-site Scripting') vulnerability exis

CVE-2021-22721 MEDIUM This Month

5.3 Jul 21

A CWE-200: Information Exposure vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.

Same weakness CWE-79 – Cross-site Scripting (XSS)

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CVE-2014-2120 MEDIUM

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CVE-2023-40000 HIGH POC

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CVE-2016-8581 MEDIUM POC

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CVE-2013-5223 MEDIUM POC

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CVE-2025-52367 MEDIUM POC

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CVE-2017-9248 CRITICAL POC

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CVE-2013-1710 CRITICAL POC

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CVE-2024-52875 HIGH POC

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References

Advisories & patches

ADVISORY http://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-194-06

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GitHub PoC

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