VulnerabilityPublished 18 Dec 2025

CVE-2023-53936: tuzitio Cameleon CMS · Cross-site Scripting

Affects tuzitio Cameleon CMSSource CVE Database V5

Not known to be exploited · CVSS 5.1 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 4.0 base score

5.1Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: Passive
Vulnerable system confidentiality: Low
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: Low
Subsequent system integrity: Low
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, 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: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system 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 Vulnerable System.
Vulnerable system 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 to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system 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 Subsequent System.
Subsequent system 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 to the Subsequent System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Dec 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

Affected software

Product	Affected	Fixed in
GitHubowen2345/camaleon-cms`pkg:github/owen2345/camaleon-cms`Other threats	Affected =2.7.4	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Cameleon CMS to a version where this vulnerability is patched once available.
In the interim, restrict administrator privileges to trusted personnel only and monitor administrator activities closely.
Implement Content Security Policy (CSP) headers to restrict execution of inline scripts and SVG content where feasible.
Sanitize and validate all inputs on the server side, especially post titles, to disallow embedded scripts or SVG elements.
Educate administrators about the risks of injecting untrusted content and enforce strict content creation guidelines.
Employ web application firewalls (WAF) with rules designed to detect and block XSS payloads targeting the CMS.
Regularly audit CMS content for suspicious or malformed post titles that may contain malicious scripts.
Monitor user sessions for anomalies that may indicate session hijacking attempts.

Description

CVE-2023-53936 is a persistent cross-site scripting (XSS) vulnerability in tuzitio Cameleon CMS version 2.7.4. Authenticated administrators can inject malicious scripts into post titles, specifically via embedded SVG scripts. These scripts execute when other users hover their mouse over the post title, enabling theft of session cookies and arbitrary JavaScript execution. The vulnerability requires administrator-level privileges but no user interaction beyond mouseover. It has a CVSS 4.0 base score of 5.1, indicating medium severity. No known exploits are currently reported in the wild.

Impact

For European organizations using Cameleon CMS 2.7.4, this vulnerability poses a risk of session hijacking and unauthorized script execution within the CMS environment. Attackers with administrator access can implant persistent malicious scripts that affect all users viewing the compromised posts. This can lead to theft of sensitive session information, unauthorized actions performed on behalf of users, and potential spread of malware or further exploitation within the network. The impact is particularly concerning for organizations with multiple administrators or those that allow external contributors with elevated privileges. Confidentiality and integrity of user sessions and data are at risk, potentially undermining trust in the CMS platform and exposing organizations to regulatory compliance issues under GDPR if user data is compromised. Availability impact is limited but could occur if attackers leverage the vulnerability to disrupt CMS functionality.

References

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