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CVE-2023-25728

MEDIUM
6.5
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
MEDIUM6.5
Exploit prediction
EPSS 0.7%
SSVC
PoC

Description

The <code>Content-Security-Policy-Report-Only</code> header could allow an attacker to leak a child iframe's unredacted URI when interaction with that iframe triggers a redirect. 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=1790345
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 automatablePartial impact

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

CVSS

6.5MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-203

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