dbcve.org
FirefoxWeb browser · Mozilla

CVE-2025-8030

HIGH · 8.1 CVSS v3.1 Published 2025-07-22
Fix available
A fix is available. Upgrade to 128.13.0 / 140.1.0 or later.
See remediation →
88/100
Remediation priority · High
Remotely reachable No privileges

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 · unedited
Insufficient escaping in the “Copy as cURL” feature could potentially be used to trick a user into executing unexpected code. This vulnerability was fixed in Firefox 141, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.

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 confidence

Insufficient escaping in Firefox and Thunderbird's 'Copy as cURL' feature allows command injection via maliciously crafted data. When a user copies content as a curl command, special characters are not properly escaped, potentially tricking users into executing arbitrary commands when the generated curl command is run in a terminal.

MitigationUpdate to Firefox 141 (or ESR 128.13/140.1) and Thunderbird 141 (or ESR 128.13/140.1) to obtain the patched versions that properly escape special characters in the 'Copy as cURL' feature.

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
FirefoxWeb browser
Affected:< 128.13.0< 141.0>= 140.0, < 140.1.0
ThunderbirdApplication
Affected:< 128.13.0< 141.0>= 140.0, < 140.1.0

CVSS 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
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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 checks

Work through these to decide whether this CVE applies to you.

  1. Check installed Firefox version
    In Firefox, go to Help > About Firefox (or navigate to about:support). Note the version number displayed.
    Affected if The version is earlier than 128.13.0, OR is 128.13.0 or later but earlier than 140.1.0, OR is between 140.0.0 and 140.0.x (any x). The fixed versions are 128.13.0 and 140.1.0 or later.
  2. Check installed Thunderbird version
    In Thunderbird, go to Help > About Thunderbird. Note the version number displayed.
    Affected if The version is earlier than 128.13.0, OR is 128.13.0 or later but earlier than 140.1.0, OR is between 140.0.0 and 140.0.x (any x). The fixed versions are 128.13.0 and 140.1.0 or later.
  3. Confirm the Copy as cURL feature is accessible
    In Firefox or Thunderbird, open a web page, right-click anywhere and look for 'Copy as cURL' in the context menu, or use the developer tools Network tab, right-click a request, and select 'Copy as cURL'.
    Affected if The feature exists and can be invoked. If it is present, the vulnerability applies to that installed version if the version check above shows it is affected.
  4. Test for proper escaping of special characters (optional manual verification)
    If the feature is available on an affected version, copy a request containing shell special characters (such as backticks, $(), semicolons, or quotes) as cURL. Inspect the output to see if characters are properly escaped with backslashes or single quotes.
    Affected if The generated curl command does NOT escape special shell metacharacters - it passes them raw. This confirms the vulnerability is present and exploitable in that copy operation.

A user is affected if they are running any Firefox or Thunderbird version earlier than 128.13.0, or any version from 128.13.0 up to but not including 140.1.0, and they use the Copy as cURL feature with content containing unescaped shell special characters.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Upgrade available Upgrade to 128.13.0 / 140.1.0 / 141.0 or later
Fixed in 128.13.0140.1.0141.0
Interim mitigation

Update to Firefox 141 (or ESR 128.13/140.1) and Thunderbird 141 (or ESR 128.13/140.1) to obtain the patched versions that properly escape special characters in the 'Copy as cURL' feature.

Recommended fix High confidence

Firefox 141 / Firefox ESR 128.13 / Firefox ESR 140.1 / Thunderbird 141 / Thunderbird ESR 128.13 / Thunderbird ESR 140.1

  1. Identify the currently installed Firefox or Thunderbird version from the application menu (Help > About)
  2. If using Firefox or Thunderbird 128.x ESR (Extended Support Release), upgrade to version 128.13.0 or later
  3. If using Firefox or Thunderbird 140.0.x, upgrade to version 140.1.0 or later
  4. If using a regular (non-ESR) Firefox or Thunderbird version below 141, upgrade to version 141.0 or later
  5. After upgrading, verify the version in Help > About to confirm the update was applied

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Firefox Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
5.0 hours of engineering $890
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,424.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2025-8030 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-8030 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data