Security readout for executives and security teams
Plain-English summary
Firefox’s JavaScript just-in-time compiler could generate incorrect code, creating a remotely reachable integrity risk. The supplied record rates it high severity and states that Firefox 143.0.3 fixes the issue. Organizations should promptly identify Firefox installations and update systems covered by Mozilla’s advisory.
Executive priority
Treat as a high-priority browser update because the stated attack path is remote, low complexity, and requires no privileges or interaction. Expedite deployment where Firefox handles untrusted content, while avoiding claims of active exploitation unsupported by the supplied evidence.
Technical view
CVE-2025-11153 is a JIT miscompilation vulnerability classified as CWE-94. CVSS 3.1 scores it 7.5 with network reachability, low complexity, no privileges, and no user interaction. The vector indicates integrity impact without stated confidentiality or availability impact. Detailed triggering conditions are not provided in the bundle.
Likely exposure
Potential exposure exists where Firefox installations covered by Mozilla’s advisory have not received version 143.0.3. The bundle’s affected-version field also lists 143.0.3, conflicting with the statement that 143.0.3 fixes the issue; confirm precise affected versions against Mozilla’s advisory.
Exploitation context
The supplied record is not in CISA KEV, and the bundle provides no evidence of active exploitation or a public exploit. The CVSS vector describes a network-reachable, low-complexity path requiring neither privileges nor user interaction, but the available evidence does not document practical attack conditions.
Researcher notes
The public bundle identifies the JIT component and CWE-94 but provides no root-cause, trigger, proof-of-concept, or observed-exploitation details. Its affected array lists 143.0.3 although the description says that release fixes the vulnerability. Researchers and vulnerability managers should use Mozilla’s advisory as the authoritative scope reference.
Mitigation direction
- Update affected Firefox installations to version 143.0.3 or later.
- Consult Mozilla’s advisory for exact affected-release and platform scope.
- Prioritize managed endpoints where Firefox processes untrusted web content.
- Verify update enforcement across desktop, virtualized, and remotely managed systems.
Validation and detection
- Inventory installed Firefox versions across managed endpoints.
- Confirm installations covered by Mozilla’s advisory are version 143.0.3 or later.
- Check deployment reporting for failed, deferred, or incomplete browser updates.
- Reconcile the bundle’s contradictory version field with Mozilla’s published advisory.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2025-11153 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N3.93.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://bugzilla.mozilla.org/show_bug.cgi?id=1987481CVE reference, mozilla
- https://www.mozilla.org/security/advisories/mfsa2025-80/CVE reference, mozilla
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Control of Generation of Code ('Code Injection')
Improper Control of Generation of Code ('Code Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.