CVE-2023-25739

HIGH

8.8

CVSS Score

Published: June 2, 2023 at 12:00 AM UTC

Updated: October 24, 2026 at 01:10 PM UTC

3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity

HIGH8.8

Exploit prediction

EPSS 0.7%

SSVC

PoC

Description

Module load requests that failed were not being checked as to whether or not they were cancelled causing a use-after-free in <code>ScriptLoadContext</code>. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firefox · Mozilla

95%

v < 110.0

Affected range stops below 110, so it looks safe — our inference, not a vendor statement

Affected range stops below 110.0, so it looks safe — our inference, not a vendor statement

Firefox ESR · Mozilla

95%

v < 102.8

Affected range stops below 102.8, so it looks safe — our inference, not a vendor statement

Thunderbird · Mozilla

95%

v < 102.8

Affected range stops below 102.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

Issue TrackingPermissions Required

Source: [email protected]

https://bugzilla.mozilla.org/show_bug.cgi?id=1811939

Vendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2023-05/

Vendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2023-06/

Vendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2023-07/

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-416

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