Cisco Unified Contact Center Express: Client-Side Enforcement of Server-Side Security
CVE-2025-20113 is a high-severity client-side enforcement of server-side security vulnerability in Cisco Unified Contact Center Express from Cisco, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected Cisco Unified Contact Center Express versions: 10.6(1); 10.5(1)SU1; 10.6(1)SU3, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.42% 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 Cisco Unified Contact Center Express you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on sec.cloudapps.cisco.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Cisco | Cisco Unified Contact Center Express | 10.6(1); 10.5(1)SU1; 10.6(1)SU3; 12.0(1); 10.0(1)SU1; 10.6(1)SU1; 11.0(1)SU1; 11.5(1)SU1; and 32 more ranges | Not stated |
| Cisco | Cisco Unified Intelligence Center | 11.6(1); 10.5(1); 11.0(1); 11.5(1); 12.0(1); 12.5(1); 11.0(2); 12.6(1); and 12 more ranges | Not stated |
| Cisco | Unified Intelligence Center | 10.5\(1\); 11.0\(1\); 11.0\(2\); 11.0\(3\); 11.5\(1\); 11.6\(1\); 12.0\(1\); 12.5\(1\); and 5 more ranges | Not stated |
| Cisco | Unified Contact Center Express | 8.5\(1\); 9.0\(2\)su3es04; 10.0\(1\)su1; 10.0\(1\)su1es04; 10.5\(1\); 10.5\(1\)su1; 10.5\(1\)su1es10; 10.6\(1\); and 32 more ranges | 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
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- LowLimited modification of data is possible.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N. Scored by CNA (cisco.com).
Official description
A vulnerability in Cisco Unified Intelligence Center could allow an authenticated, remote attacker to elevate privileges to Administrator for a limited set of functions on an affected system. This vulnerability is due to insufficient server-side validation of user-supplied parameters in API or HTTP requests. An attacker could exploit this vulnerability by submitting a crafted API or HTTP request to an affected system. A successful exploit could allow the attacker to access, modify, or delete data beyond the sphere of their intended access level, including obtaining potentially sensitive information stored in the system.
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: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Cisco Unified Contact Center Express
- 7.2 High severity
- 7.2 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 8.8 High severity
- 7.2 High severity
Recent Client-Side Enforcement of Server-Side Security vulnerabilities
- 9.9 Critical severity
- 9.9 Critical severity
- 9.9 Critical severity
- 8.2 High severity
- 7.7 High severity
- 8.8 High severity
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