# CVE-2021-22818: Auth bypass in n/a

> Attackers can gain unauthorized access to EV charging station web interfaces via brute force attacks due to missing rate limiting.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Jan 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-g234-r5wx-qx69

## What is CVE-2021-22818?

CVE-2021-22818 is a high-severity authentication bypass vulnerability in n/a, published on 28 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A CWE-307 Improper Restriction of Excessive Authentication Attempts vulnerability exists that could allow an attacker to gain unauthorized access to the charging station web interface by performing brute force attacks. Affected Products: EVlink City EVC1S22P4 / EVC1S7P4 (All versions prior to R8 V3.4.0.2 ), EVlink Parking EVW2 / EVF2 / EVP2PE (All versions prior to R8 V3.4.0.2), and EVlink Smart Wallbox EVB1A (All versions prior to R8 V3.4.0.2)

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2021-22818?

It affects 6 products.


Products: Schneider-Electric Evlink City Evc1s22p4 Firmware, Schneider-Electric Evlink City Evc1s7p4 Firmware, Schneider-Electric Evlink Parking Evf2 Firmware, Schneider-Electric Evlink Parking Evp2pe Firmware, Schneider-Electric Evlink Parking Evw2 Firmware, Schneider-Electric Evlink Smart Wallbox Evb1a Firmware.

## How do I fix CVE-2021-22818?

No fix has been published for CVE-2021-22818 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-22818 being exploited?

There is no known exploitation of CVE-2021-22818 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-22820](https://insights.sbomify.com/CVE-2021-22820/): Auth bypass in n/a (critical 9.8)
- [CVE-2021-22707](https://insights.sbomify.com/CVE-2021-22707/): Hardcoded credentials 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 ) (critical 9.8)
- [CVE-2021-22727](https://insights.sbomify.com/CVE-2021-22727/): Weak cryptography 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 ) (critical 9.8)
- [CVE-2021-22729](https://insights.sbomify.com/CVE-2021-22729/): Hardcoded credentials 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 ) (critical 9.8)
- [CVE-2021-22730](https://insights.sbomify.com/CVE-2021-22730/): Hardcoded credentials 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 ) (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-22818 and fix it if it is affected.

What it is: CVE-2021-22818 is a high-severity authentication bypass vulnerability in n/a, published on 28 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-22818 in the wild and no public exploit code.

Affected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-22818/ (Markdown: https://insights.sbomify.com/CVE-2021-22818/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-22818
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-22818
- OSV: https://osv.dev/vulnerability/CVE-2021-22818

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-22818/
Summaries are generated and may contain mistakes; the official description above is the record.