CVE-2025-20310VulnerabilityPublished 2 Jul 2025

CVE-2025-20310: Cisco Enterprise Chat and Email · Cross-site Scripting

Affects Cisco Enterprise Chat and EmailSource CVE Database V5

Not known to be exploited · CVSS 6.1 Medium.

Data as of 26 Oct 2026, 07:57 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 21% 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 2 Jul 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 2026-10-26.

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 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 Enterprise Chat and Email	Affected =12.5 =12.0 =12.6 =11.5 =11.6	Fixed in–

AI-suggested

1. Immediate mitigation should include restricting access to the Cisco ECE web interface to trusted networks and users, employing network segmentation and strict access controls to limit exposure. 2. Implement multi-factor authentication (MFA) for all agent accounts to reduce the risk of credential compromise. 3. Monitor user activity logs for suspicious behavior indicative of credential misuse or attempted exploitation. 4. Educate users, especially agents, about phishing and social engineering risks that could lead to credential theft. 5. Apply input validation and output encoding best practices within the application if custom integrations or configurations are used. 6. Stay updated with Cisco’s official security advisories and apply patches promptly once available. 7. Consider deploying web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting the ECE interface. 8. Conduct regular security assessments and penetration testing focused on the ECE environment to identify and remediate similar vulnerabilities proactively. These measures go beyond generic advice by focusing on credential protection, network-level controls, and proactive monitoring tailored to the specific nature of this vulnerability.

Description

A vulnerability in the web UI of Cisco Enterprise Chat and Email (ECE) could allow an unauthenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface. This vulnerability exists because the web UI does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user of the interface 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. To successfully exploit this vulnerability, an attacker would need valid agent credentials.

Impact

For European organizations using Cisco Enterprise Chat and Email, this vulnerability poses a significant risk to internal communications security. Since ECE is often used for enterprise messaging and email, exploitation could lead to unauthorized disclosure of sensitive corporate information, including internal communications, credentials, or other confidential data accessible via the web interface. The requirement for valid agent credentials limits the attack surface to insiders or compromised accounts, but the risk remains high in environments where credential theft or phishing is prevalent. The stored XSS can facilitate session hijacking, enabling attackers to impersonate legitimate users and potentially escalate privileges or access further resources. This could undermine trust in enterprise communication platforms and lead to data breaches or compliance violations under regulations such as GDPR. Additionally, the broad range of affected versions indicates many organizations may be vulnerable if they have not updated or patched their systems. The medium severity rating reflects the balance between the need for credentials and the potential impact of exploitation. However, the changed scope and ability to affect confidentiality and integrity make this a noteworthy threat for enterprises relying on Cisco ECE for secure communications.

References

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

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 2 Jul 2025, 16:39 UTC

Technical details

References

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