CVE-2023-23598: Mozilla Firefox
Affects Mozilla FirefoxSource CVE Database V5
Not known to be exploited : upgrade to 109 or 102.7 soon.
Data as of 26 Oct 2026, 08:30 UTC
Rated High by the CNA (mozilla) · No CVSS score from NVD or the CNA
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 50% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 109, 102.7
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 26 Oct 2026.
What to do
Upgrade Mozilla Firefox to 109 or 102.7.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Mozilla Firefox | Affected
| Fixed in
|
AI-suggested
Mozilla has released official fixes for this vulnerability in Firefox 109 and Thunderbird 102.7. Users and administrators should update to these versions or later to remediate this issue. No additional mitigations are required once updated.
Description
CVE-2023-23598 is a high-impact vulnerability in Mozilla Firefox and Thunderbird on Linux systems using GTK. It arises from Firefox's GTK wrapper code using the text/plain MIME type for drag data, which GTK treats as containing file URLs. This allows a website to read arbitrary files via the DataTransfer.setData call. The flaw affects Firefox versions prior to 109 and Thunderbird versions prior to 102.7. Mozilla fixed this issue in Firefox 109 and Thunderbird 102.7.