CVE-2025-30190VulnerabilityPublished 27 Nov 2025Updated 3 Dec 2025

CVE-2025-30190: Open-Xchange OX App Suite · Cross-site Scripting

Affects Open-Xchange OX App SuiteSource CVE Database V5

Not known to be exploited · CVSS 5.4 Medium.

Data as of 26 Oct 2026, 07:57 UTC

CVSS 3.1 base score

5.4Medium

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

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% 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:U/C:L/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
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: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
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 27 Nov 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
Open-Xchange GmbH OX App Suite	Affected =0	Fixed in–

AI-suggested

Organizations should immediately apply the official patches and updates provided by Open-Xchange GmbH once available to remediate the vulnerability. In parallel, implement strict input validation and output encoding controls on any custom integrations or extensions interacting with OX App Suite documents. Enhance user awareness training focused on phishing and social engineering to reduce the likelihood of users editing malicious documents. Deploy web application firewalls (WAFs) with rules designed to detect and block suspicious script injection attempts targeting OX App Suite endpoints. Monitor logs for unusual document editing activities or anomalous script execution patterns. Consider isolating document editing environments or restricting document types that can be edited within the suite. Regularly review and update security policies governing document handling and collaboration tools. Finally, maintain an incident response plan that includes procedures for addressing potential XSS exploitation scenarios.

Description

Malicious content at office documents can be used to inject script code when editing a document. Unintended actions can be executed in the context of the users account, including exfiltration of sensitive information. Please deploy the provided updates and patch releases. No publicly available exploits are known

Impact

For European organizations, the impact of CVE-2025-30190 centers on the confidentiality and integrity of sensitive corporate data managed within the OX App Suite. Successful exploitation could lead to unauthorized disclosure of emails, contacts, and calendar information, potentially exposing business secrets or personal data protected under GDPR. The ability to execute scripts in the user's context may also allow attackers to perform actions on behalf of the user, such as sending fraudulent communications or manipulating data. While availability is not affected, the breach of confidentiality and integrity can undermine trust and lead to regulatory penalties. Organizations in sectors with high data sensitivity—such as finance, healthcare, and government—face elevated risks. The requirement for user interaction means that phishing or social engineering remains the primary attack vector, which is a common threat vector in Europe. Given the widespread use of OX App Suite in European enterprises and service providers, the vulnerability could be leveraged in targeted attacks against strategic organizations.

References

documentation.open-xchange.com/appsuite/security/advisories/csaf/2025/oxas-adv-2025-0003.json (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 4 Dec 2025, 10:58 UTC

Technical details

References

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