Security readout for executives and security teams
Plain-English summary
WatchGuard Fireware OS Web UI requests may trust a manipulated HTTP Host header. A network-reachable attacker could abuse this to redirect administrators, contaminate cached content, or cause malicious JavaScript to appear in Web UI responses. The supplied CVSS 4.0 score is 5.1, indicating moderate risk, but administrative interfaces warrant prompt review.
Executive priority
Prioritize identifying internet-accessible or broadly reachable management interfaces. Remediate confirmed affected appliances promptly, while treating isolated, tightly controlled interfaces as lower urgency. Exact version scope and the prescribed fix must be confirmed with WatchGuard because the supplied affected-version data is internally inconsistent.
Technical view
CVE-2025-0178 is an improper input validation issue (CWE-20) in Fireware OS. An unauthenticated attacker with network access can manipulate the HTTP Host header sent to the Web UI. Exploitation requires subsequent user interaction and may affect confidentiality across the vulnerable system and downstream systems. The bundle does not reliably identify affected releases.
Likely exposure
Exposure is most likely where the Fireware Web UI is reachable from untrusted or broadly accessible networks. The supplied affected-product entries mention version 12.0 but mark it unaffected, creating ambiguity. Do not treat that version as vulnerable without confirmation from WatchGuard's advisory or asset-specific vendor guidance.
Exploitation context
The supplied sources do not establish active exploitation, and this CVE is not identified as CISA KEV-listed in the bundle. Plausible impacts include malicious redirects, web-cache poisoning, and JavaScript injection into Web UI responses. User interaction is required according to the supplied CVSS vector.
Researcher notes
The stated weakness is CWE-20 with CVSS 4.0 score 5.1: AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:L/SI:L/SA:L. The bundle supports Host-header manipulation and downstream redirect, cache, and script-injection consequences. It does not provide reliable affected-version boundaries, technical root-cause detail, patch identifiers, or evidence of exploitation.
Mitigation direction
- Review WatchGuard's advisory for confirmed affected versions and vendor-approved remediation.
- Restrict Web UI access to trusted management networks and authorized administrators.
- Avoid exposing the Web UI directly to the public internet.
- Apply the vendor-supported update or mitigation specified for each confirmed affected appliance.
Validation and detection
- Inventory Firebox appliances, Fireware OS versions, and Web UI exposure paths.
- Compare each installed version against WatchGuard's current advisory.
- Confirm management access is restricted to trusted sources and networks.
- After remediation, verify the installed version and repeat approved defensive testing.
- Review proxy and Web UI logs for anomalous Host values or unexpected redirects.
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-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2025-0178 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
- 5.1 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:L/SI:L/SA:L
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:N/UI:A/VC:L/VI:N/VA:N/SC:L/SI:L/SA:L——WatchGuardVulnerability scoring details
Base CVSS 4.0 score
5.1MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:L/SI:L/SA:L
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.
- Source timelineWatchGuard
Updated to add Fireware OS 12.5.13 as a resolved release
- 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-2025-0178CVE reference, WatchGuard · vendor-advisory
- https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00003CVE 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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.