CVE-2023-6420VulnerabilityPublished 30 Nov 2023Updated 3 Jun 2025

CVE-2023-6420: Voovi Social Networking Script · Cross-site Scripting

Affects Voovi Social Networking ScriptSource CVE Database V5

Not known to be exploited · CVSS 6.5 Medium.

Data as of 26 Oct 2026, 06:15 UTC

CVSS 3.1 base score

6.5Medium

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

EPSS: 0.5% chance of exploitation in 30 days – higher than 44% 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:H/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: None
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: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within 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 30 Nov 2023
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 2026-10-25.

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
Voovi Social Networking Script Voovi Social Networking Script	Affected =1.0	Fixed in–

AI-suggested

1. Immediate mitigation should include implementing strict input validation and output encoding on the 'emailadd' parameter in signup2.php to neutralize any injected scripts. Use context-aware encoding libraries to ensure all user inputs are safely handled before rendering in HTML. 2. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the browser, reducing the impact of potential XSS payloads. 3. Educate users and administrators about phishing risks and encourage cautious behavior regarding unsolicited links or messages. 4. Monitor web application logs for suspicious requests targeting the vulnerable parameter to detect exploitation attempts early. 5. If possible, isolate or disable the vulnerable signup functionality temporarily until a patch or update is released by the vendor. 6. Engage with the vendor or community to request an official patch or update addressing this vulnerability. 7. Consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block malicious payloads targeting the 'emailadd' parameter. 8. Regularly review and update all third-party components and scripts to ensure known vulnerabilities are remediated promptly.

Description

A vulnerability has been reported in Voovi Social Networking Script version 1.0 that allows a XSS via signup2.php in the emailadd parameter, the exploitation of which could allow a remote attacker to send a specially crafted JavaScript payload and partially take over the browser session of an authenticated user.

Impact

For European organizations using the Voovi Social Networking Script version 1.0, this vulnerability poses a significant risk to user data confidentiality and trust. Exploitation could allow attackers to hijack authenticated user sessions, potentially leading to unauthorized access to personal information, private communications, or administrative functions within the social networking platform. This could result in reputational damage, regulatory non-compliance (e.g., GDPR violations due to data breaches), and loss of user confidence. Since the vulnerability requires user interaction, phishing or social engineering campaigns could be used to lure users into triggering the exploit. Organizations operating social networking services or community platforms based on this script are particularly at risk. Additionally, the lack of available patches means the window of exposure remains open until mitigations or updates are applied. The medium severity rating suggests that while the threat is serious, it is not immediately critical, but should be addressed promptly to prevent escalation or chaining with other vulnerabilities.

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

incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-voovi-social-networking-script (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Jul 2025, 23:27 UTC

WeaknessesCWE-79

Technical details

References

Community reviews

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