CVE-2023-23597: Mozilla Firefox · Vulnerability
Affects Mozilla FirefoxSource CVE Database V5
Not known to be exploited : upgrade to 109 soon.
Data as of 25 Oct 2026, 21:29 UTC
Rated High by the CNA (mozilla) · No CVSS score from NVD or the CNA
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 109
Exploitation evidence
Disclosed: evidence found.
CVE published 2 Jun 2023
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Upgrade Mozilla Firefox to 109.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Mozilla Firefox | Affected
| Fixed in
|
AI-suggested
A fix for this vulnerability is available in Firefox version 109. Users and administrators should update to Firefox 109 or later to remediate this issue. No additional mitigation steps are required as the official fix fully addresses the vulnerability.
Description
CVE-2023-23597 is a logic bug in Mozilla Firefox prior to version 109 that allows a compromised web child process to disable web security opening restrictions. This can cause a new child process to spawn within the file:// context, which, if exploited with a reliable primitive, could lead to arbitrary file read. The vulnerability was fixed in Firefox 109.