VulnerabilityPublished 3 Sep 2025Updated 26 Feb 2026

CVE-2025-20330: Cisco Unified Communications Manager IM and Presence Service · Cross-site Scripting

Affects Cisco Unified Communications Manager IM and Presence ServiceSource CVE Database V5

Not known to be exploited · CVSS 6.1 Medium.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score

6.1Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 3 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Cisco Cisco Unified Communications Manager IM and Presence Service	Affected =12.5 =14 =15	Fixed in–

AI-suggested

Organizations should immediately verify whether their Cisco Unified Communications Manager IM and Presence Service deployments are running affected versions listed in the advisory. They should monitor Cisco’s official security advisories for patches or updates addressing CVE-2025-20330 and apply them as soon as they become available. In the interim, administrators should restrict access to the web-based management interface using network segmentation, VPNs, or IP whitelisting to limit exposure to trusted users only. Implementing web application firewalls (WAFs) with rules to detect and block XSS attack patterns can provide additional protection. Educate users and administrators about the risks of clicking unsolicited or suspicious links, especially those purporting to be related to system management. Enable multi-factor authentication (MFA) on management interfaces to reduce the risk of session hijacking. Regularly audit and monitor logs for unusual access patterns or signs of attempted exploitation. Consider disabling or limiting browser-based management interface usage if alternative management methods are available until patches are applied.

Description

A vulnerability in the web-based management interface of Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. This vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

Impact

The impact of CVE-2025-20330 is primarily on confidentiality and integrity of the affected system’s management interface. Successful exploitation can lead to execution of arbitrary scripts in the context of the web interface, enabling attackers to steal sensitive information such as session cookies, authentication tokens, or configuration data accessible via the browser. This could facilitate further attacks, including unauthorized administrative actions or lateral movement within the network. Although availability is not directly impacted, the compromise of management interface credentials or sessions could indirectly affect system stability or operations. The vulnerability affects a critical component of Cisco’s unified communications infrastructure, which is widely deployed in enterprises, government agencies, and service providers globally. Exploitation could undermine trust in communications systems, disrupt administrative control, and expose sensitive organizational communications data. The requirement for user interaction limits automated exploitation but social engineering tactics could be used to increase success likelihood. The broad range of affected versions means many organizations remain vulnerable if patches are not applied promptly.

References

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-imp-xss-XQgu4HSG (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Feb 2026, 00:23 UTC

Technical details

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