Security readout for executives and security teams
Plain-English summary
An administrator can save malicious script content through a Firebox Access Portal configuration. When another management user later views the affected interface, the script may run in that user’s browser. The administrator-level access requirement and required user interaction reduce likelihood, but successful exploitation could compromise trusted management activity.
Executive priority
Treat as a planned, near-term management-plane remediation rather than an emergency. Prioritize appliances with exposed management interfaces, numerous administrators, shared credentials, or signs of account compromise. Escalate immediately if suspicious Access Portal changes or administrator activity are found.
Technical view
CVE-2025-4805 is a stored cross-site scripting vulnerability (CWE-79) in the WatchGuard Firebox management interface through Access Portal configuration. Exploitation is remote over the network but requires administrator privileges and interaction by another management user. The supplied CVSS 4.0 score is 4.8, with low subsequent-system confidentiality and integrity impact.
Likely exposure
The supplied record identifies Fireware OS 12.0. Practical exposure requires use of the affected Access Portal configuration, management-interface access, and a potentially hostile or compromised administrator account. The bundle does not establish whether every 12.0 build is vulnerable, and its affected-data default status is “unaffected”; confirm exact builds against WatchGuard’s advisory.
Exploitation context
The bundle marks this CVE as absent from KEV and provides no evidence of active exploitation. The attack is constrained by its administrator privilege requirement and the need for another management user to encounter stored content. Risk increases where administrative credentials are shared, compromised, or broadly assigned.
Researcher notes
The vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N. Available evidence supports stored XSS affecting a subsequent management user, not unauthenticated appliance compromise. Exact vulnerable builds, fixed versions, payload handling, and affected interface paths are not specified in the supplied bundle.
Mitigation direction
- Check WatchGuard’s advisory for affected builds and the vendor-designated fixed release or mitigation.
- Upgrade according to WatchGuard guidance after confirming appliance compatibility and operational requirements.
- Restrict management-interface access to trusted administrative networks and authorized personnel.
- Review administrator accounts and remove unnecessary or stale privileges.
Validation and detection
- Inventory Firebox appliances and record their exact Fireware OS versions and builds.
- Compare each build with WatchGuard’s current CVE-2025-4805 advisory.
- Review Access Portal configuration changes and administrator activity for unexpected entries.
- Confirm management access is restricted and administrator accounts follow least privilege.
- After remediation, verify the installed build matches WatchGuard’s recommended release.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2025-4805 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
- Medium
- CVSS
- 4.8 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N——WatchGuardVulnerability scoring details
Base CVSS 4.0 score
4.8MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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://psirt.watchguard.com/CVE-2025-4805CVE reference, WatchGuard · vendor-advisory
- https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00007CVE reference, WatchGuard · vendor-advisory
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 Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.