CVE-2021-22706
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceA stored Cross-Site Scripting (XSS) vulnerability (CWE-79) in the EVlink charging station web servers allows attackers to submit malicious parameters that execute in the context of the station manager's session, enabling session hijacking and unauthorized actions.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< r8_v3.4.0.1< r8_v3.4.0.1< r8_v3.4.0.1< r8_v3.4.0.1< r8_v3.4.0.1< r8_v3.4.0.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the EVlink modelLocate the model number on the charging station physical label or check the device information page in the web management interface (typically under Settings > Device Info or About). Common model identifiers include Evc1s22p4, Evc1s7p4, Evw2, Evf2, Ev.2, and Evb1a.Affected if The model matches any of the following: Evlink City Evc1s22p4, Evlink City Evc1s7p4, Evlink Parking Evw2, Evlink Parking Evf2, Evlink Parking Ev.2, or Evlink Smart Wallbox Evb1a
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Check the firmware versionAccess the charging station web interface and navigate to the firmware or version information section. The version is typically displayed as a string such as 'r8_v3.x.x.x' or similar.Affected if The installed firmware version is earlier than r8_v3.4.0.1 (for example, r8_v3.3.0.0, r8_v3.2.0, or any version with a number lower than 3.4.0.1 in the r8 branch)
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Verify the web management interface is enabledConfirm that the embedded web server is accessible on the charging station. This is typically accessible via HTTP/HTTPS on the device's network IP address. Check network settings to ensure the web interface is active.Affected if The web management interface is enabled and accessible on the network, as the XSS vulnerability exists within this web server component
You are affected if your EVlink charging station is one of the listed models (Evlink City, Evlink Parking, or Evlink Smart Wallbox) and the firmware version is below r8_v3.4.0.1, with the web management interface enabled.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate affected products (EVlink City, EVlink Parking, EVlink Smart Wallbox) to version R8 V3.4.0.1 or later, which contains the vendor patch for proper input sanitization.
- Consultation4.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-22706 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-22706 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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