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CVE-2023-25751

MEDIUM
6.5
CVSS Score
Published: June 2, 2023 at 12:00 AM UTC
Updated: October 23, 2026 at 11:10 PM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.7%
SSVC
PoC

Description

Sometimes, when invalidating JIT code while following an iterator, the newly generated code could be overwritten incorrectly. This could lead to a potentially exploitable crash. This vulnerability affects Firefox < 111, Firefox ESR < 102.9, and Thunderbird < 102.9.

Affected

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

Firefox· Mozilla
95%
v < 111.0
Affected range stops below 111, so it looks safe — our inference, not a vendor statement
Affected range stops below 111.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
95%
v < 102.9
Affected range stops below 102.9, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 102.9
Affected range stops below 102.9, so it looks safe — our inference, not a vendor statement

References (4)

Issue TrackingPermissions RequiredVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1814899
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-09/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-10/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-11/

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

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

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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