VulnerabilityPublished 2 Feb 2026Updated 3 Feb 2026

CVE-2025-70958: Subrion CMS · Cross-site Scripting

Source CVE Database V5

Not known to be exploited · CVSS 6.1 Medium.

Data as of 26 Oct 2026, 15:59 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 Feb 2026
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

Immediately restrict access to the installation module after initial setup, ideally by removing or disabling it to prevent external access.
Implement strict input validation and output encoding on the dbuser, dbpwd, and dbname parameters to neutralize malicious scripts.
Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers.
Educate users and administrators about phishing risks and the dangers of clicking untrusted links.
Monitor web server logs for suspicious requests targeting the installation module parameters.
If possible, upgrade to a patched version of Subrion CMS once available or apply vendor-provided patches.
Use web application firewalls (WAFs) with rules to detect and block reflected XSS payloads targeting these parameters.
Conduct regular security assessments and penetration testing focusing on input handling in web applications.

Description

CVE-2025-70958 is a medium severity reflected cross-site scripting (XSS) vulnerability found in the installation module of Subrion CMS version 4.2.1. Attackers can inject malicious JavaScript payloads via the dbuser, dbpwd, and dbname parameters, which are reflected back in the user's browser context. Exploitation requires user interaction, such as clicking a crafted URL, and no authentication is needed. The vulnerability impacts confidentiality and integrity by potentially stealing session tokens or manipulating client-side data. While no known exploits are currently reported in the wild, the vulnerability poses a risk especially to organizations using Subrion CMS for web content management. European organizations using this CMS should prioritize patching or mitigating this issue to prevent client-side attacks. Countries with higher adoption of Subrion CMS and significant web infrastructure are more likely to be affected. Mitigation includes input validation, output encoding, and restricting access to the installation module post-deployment.

Impact

For European organizations using Subrion CMS 4.2.1, this vulnerability could lead to client-side attacks that compromise user confidentiality and data integrity. Attackers could steal session cookies, perform actions on behalf of users, or deliver malicious payloads that affect end users or administrators. This may result in unauthorized access to sensitive information or manipulation of web content. The reflected XSS nature means the attack requires user interaction, typically via phishing or social engineering, which could target employees or customers. The impact on availability is minimal, but reputational damage and compliance risks (e.g., GDPR) are significant if user data is compromised. Organizations relying on Subrion CMS for critical web services or customer-facing portals are at higher risk. The vulnerability could also be leveraged as a stepping stone for more complex attacks if combined with other vulnerabilities or social engineering campaigns.

Summary

CVE-2025-70958 identifies multiple reflected cross-site scripting (XSS) vulnerabilities in the installation module of Subrion CMS version 4.2.1. The vulnerability arises because the installation module improperly handles user-supplied input in the dbuser, dbpwd, and dbname parameters, reflecting these values in the HTTP response without adequate sanitization or encoding. This flaw allows an attacker to craft a malicious URL containing JavaScript code within these parameters. When a user clicks the malicious link, the injected script executes in the context of the victim's browser, potentially leading to session hijacking, credential theft, or manipulation of client-side data. The vulnerability is exploitable remotely over the network (AV:N), requires no privileges (PR:N), but does require user interaction (UI:R). The scope is changed (S:C) because the vulnerability affects resources beyond the vulnerable component, potentially impacting the entire web application session. The CVSS v3.1 base score is 6.1, indicating a medium severity. No patches or known exploits are currently reported, but the vulnerability is publicly disclosed and should be addressed promptly. The CWE-79 classification confirms this is a classic reflected XSS issue. The installation module is typically accessible during initial setup, but if left accessible post-installation, it can be exploited by attackers. This vulnerability highlights the importance of secure input handling and restricting access to setup interfaces in web applications.

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

github.com/emirhanyucell/Subrion-CMS-4.2.1/blob/main/subrion-cms-exploit.txt (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 10 Feb 2026, 11:14 UTC

WeaknessesCWE-79

Technical details

References

Community reviews

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