VulnerabilityPublished 26 Aug 2025Updated 27 Aug 2025

CVE-2025-52217: SelectZero Data Observability Platform · Cross-site Scripting

Source CVE Database V5

Not known to be exploited · CVSS 5.4 Medium · fixed in 2025.5.2 : update affected systems when convenient.

Data as of 26 Oct 2026, 11:07 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 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 2025.5.2

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 26 Aug 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

AI-suggested

To mitigate CVE-2025-52217 effectively, European organizations should: 1) Prioritize upgrading the SelectZero Data Observability Platform to version 2025.5.2 or later once available, as this version addresses the vulnerability. 2) In the interim, implement strict input validation and output encoding on all user-supplied data fields within the platform, particularly legacy UI components, to prevent HTML injection. 3) Employ Content Security Policy (CSP) headers to restrict the execution of injected scripts or HTML, reducing the impact of any successful injection. 4) Educate users about phishing and social engineering risks, emphasizing caution when interacting with unexpected links or UI elements within the platform. 5) Monitor logs and user activity for unusual patterns that could indicate exploitation attempts. 6) If feasible, isolate the platform within segmented network zones with limited access to sensitive data to minimize potential damage. 7) Coordinate with SelectZero support or vendor channels to obtain patches or workarounds and stay informed about updates. These steps go beyond generic advice by focusing on immediate protective controls and user awareness tailored to the nature of the vulnerability and the platform's role.

Description

SelectZero Data Observability Platform before 2025.5.2 is vulnerable to HTML Injection. Legacy UI fields improperly handle user-supplied input, allowing injection of arbitrary HTML.

Impact

For European organizations, the impact of CVE-2025-52217 can be significant depending on the deployment scale and the sensitivity of data managed by the SelectZero Data Observability Platform. As a data observability tool, it likely processes and visualizes critical operational and business data. Exploitation could allow attackers to inject malicious HTML, potentially leading to information disclosure or enabling further attacks such as session hijacking or phishing within the platform's UI. This could undermine data integrity and confidentiality, impacting compliance with stringent European data protection regulations like GDPR. Additionally, if attackers leverage this vulnerability to manipulate UI elements, they could deceive users into performing unintended actions, increasing the risk of insider threats or data leakage. Although availability is not directly impacted, the reputational damage and potential regulatory penalties from data breaches or misuse could be substantial. The requirement for user interaction limits the attack scope but does not eliminate risk, especially in large organizations with many users. The absence of known exploits suggests a window for proactive mitigation before widespread exploitation occurs.

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #1OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Implementation · Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages.
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide…
OWASP Cheat Sheets
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Injection Prevention (opens in a new tab)
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V5.3.3 (opens in a new tab)
V1.5.1 (opens in a new tab)
Attack patterns
XSS Using MIME Type Mismatch (opens in a new tab)
DOM-Based XSS (opens in a new tab)
Reflected XSS (opens in a new tab)
Stored XSS (opens in a new tab)
Cross-Site Scripting (XSS) (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

selectzero.io/change-log/ (opens in a new tab)

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 3 Sep 2025, 01:09 UTC

WeaknessesCWE-79

Technical details

References

Community reviews

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