CVE-2023-29539
Mozilla: Content-Disposition filename truncation leads to Reflected File Download
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 11, 2023
Updated · August 20, 2026
Description
The Mozilla Foundation Security Advisory describes this flaw as:
When handling the filename directive in the Content-Disposition header, the filename would be truncated if the filename contained a NULL character. This could have led to reflected file download attacks potentially tricking users to install malware.
Statement
Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-159 · Improper Handling of Invalid Use of Special Elements