wivia 5: Client-Side Enforcement of Server-Side Security
CVE-2025-47697 is a high-severity client-side enforcement of server-side security vulnerability in wivia 5 from UCHIDA YOKO, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected wivia 5 versions: all versions. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.31% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of wivia 5 you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on uchida.co.jp for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| UCHIDA YOKO | wivia 5 | all versions | Not stated |
| Uchida | Wivia 5 Firmware | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 6.9 | Medium | CNA (jpcert.or.jp) |
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 3.0 | 6.5 | Medium | CNA (jpcert.or.jp) |
Official description
Client-side enforcement of server-side security issue exists in wivia 5 all versions. If exploited, an unauthenticated attacker may bypass authentication and operate the affected device as the moderator user.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Client-Side Enforcement of Server-Side Security
The product includes a server that relies on the client to implement a protection mechanism that is intended to protect the server.
How developers prevent this class of flaw
- If some degree of trust is required between the two entities, then use integrity checking and strong authentication to ensure that the inputs are coming from a trusted source. Design the product so that this trust is managed in a centralized fashion, especially if there are complex or numerous communication channels, in order to reduce the risks that the implementer will mistakenly omit a check in a single code path.
More Client-Side Enforcement of Server-Side Security vulnerabilities (CWE-602)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Third-party and government advisories
- jvn.jp/en/jp/JVN51394666/Third Party Advisory
Other vulnerabilities in wivia 5
- 7.2 High severity
Recent Client-Side Enforcement of Server-Side Security vulnerabilities
- 8.8 High severity
- 7.1 High severity
- 9.9 Critical severity
- 9.9 Critical severity
- 9.9 Critical severity
- 8.2 High severity
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