CVE-2023-29052VulnerabilityPublished 8 Jan 2024Updated 4 Nov 2025

CVE-2023-29052: 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: 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
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: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
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 8 Jan 2024
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

To mitigate CVE-2023-29052, European organizations should: 1) Immediately apply the vendor-provided patches or updates that implement proper sanitization of user-defined disclaimer texts in OX App Suite. 2) Restrict the ability of users to input HTML or script content in fields that are rendered in web dialogs, employing strict input validation and output encoding. 3) Implement Content Security Policy (CSP) headers to limit the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 4) Conduct regular security audits and penetration testing focusing on web application input handling and user-generated content. 5) Educate users about the risks of interacting with suspicious links or dialogs, especially within internal applications. 6) Monitor logs and user activity for unusual behavior indicative of XSS exploitation attempts. 7) Consider deploying web application firewalls (WAFs) with rules tuned to detect and block XSS payloads targeting OX App Suite. 8) Maintain a robust patch management process to ensure timely updates of all software components.

Description

Users were able to define disclaimer texts for an upsell shop dialog that would contain script code that was not sanitized correctly. Attackers could lure victims to user accounts with malicious script code and make them execute it in the context of a trusted domain. We added sanitization for this content. No publicly available exploits are known.

Impact

For European organizations, the impact of CVE-2023-29052 can be significant, especially for those relying on OX App Suite for email, collaboration, and productivity services. Successful exploitation could lead to unauthorized script execution within user sessions, enabling attackers to steal sensitive information such as credentials, personal data, or corporate communications. This can result in data breaches, loss of user trust, and potential regulatory penalties under GDPR. The integrity of user data and application behavior may be compromised, potentially facilitating further attacks like phishing or lateral movement within networks. Although availability is not directly affected, the reputational damage and operational disruptions caused by data compromise can be substantial. The requirement for authenticated access and user interaction somewhat limits the attack surface but does not eliminate risk, particularly in environments with many users and frequent external communications. Organizations in sectors with high confidentiality demands, such as finance, healthcare, and government, are particularly vulnerable to the consequences of such XSS attacks.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 4 Nov 2025, 18:32 UTC

Technical details

References

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