// For flags

CVE-2025-5264

firefox: thunderbird: Potential local code execution in “Copy as cURL” command

Severity Score

4.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability affects Firefox < 139, Firefox ESR < 115.24, and Firefox ESR < 128.11.

Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability affects Firefox < 139, Firefox ESR < 115.24, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11.

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, leading to local code execution on the user's system.

Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code or cross-origin leaks. For the stable distribution (bookworm), these problems have been fixed in version 128.11.0esr-1~deb12u1.

*Credits: Ameen Basha M K
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Local
Attack Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
None
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2025-05-27 CVE Reserved
  • 2025-05-27 CVE Published
  • 2025-06-11 CVE Updated
  • 2025-06-28 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
  • CWE-116: Improper Encoding or Escaping of Output
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Mozilla
Search vendor "Mozilla"
 Firefox
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*-
Affected
Mozilla
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 Firefox Esr
Search vendor "Mozilla" for product "Firefox Esr"
*-
Affected
Mozilla
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 Thunderbird
Search vendor "Mozilla" for product "Thunderbird"
*-
Affected
Slackware
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 Slackware Linux
Search vendor "Slackware" for product "Slackware Linux"
*-
Affected