Is CVE-2023-23598 in the CISA KEV catalog?

No. CVE-2023-23598 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-23598?

CVE-2023-23598 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2023-23598?

CVE-2023-23598 has an EPSS score of 0.64% (46th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-23598?

Upgrade firefox on debian unstable to 109.0-1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2023-23598

MEDIUM

6.5

CVSS v3

NVD

Description

Due to the Firefox GTK wrapper code's use of text/plain for drag data and GTK treating all text/plain MIMEs containing file URLs as being dragged a website could arbitrarily read a file via a call to `DataTransfer.setData`. This vulnerability affects Firefox < 109, Firefox ESR < 102.7, and Thunderbird < 102.7.

How to fix

Remediation Available

firefoxDebian

Fixed in:109.0-1CVE-2023-23598

firefoxUbuntu

Fixed in:109.0+build2-0ubuntu0.18.04.1USN-5816-1

Fixed in:109.0+build2-0ubuntu0.20.04.1USN-5816-1

thunderbirdUbuntu

Fixed in:1:102.7.1+build2-0ubuntu0.18.04.1USN-5824-1

Fixed in:1:102.7.1+build2-0ubuntu0.20.04.1USN-5824-1

Fixed in:1:102.7.1+build2-0ubuntu0.22.04.1USN-5824-1

Fixed in:1:102.7.1+build2-0ubuntu0.22.10.1USN-5824-1

DeveloperEditionWindows application

Affected:109.0Fixed in:109.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:109.0Fixed in:109.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:102.7Fixed in:102.7Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:102.7Fixed in:102.7Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.64%probability of exploitation in 30 days

46thpercentile

Moderate risk: more likely to be exploited than 46% of all known CVEs.

References

Vendor Advisory4

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-18.