VulnerabilityPublished 12 Sep 2025Updated 15 Sep 2025

CVE-2025-10330: cdevroe unmark · Cross-site Scripting

Affects cdevroe unmarkSource CVE Database V5

Public exploit available · CVSS 5.3 Medium.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 4.0 base score

5.3Medium

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

EPSS: 0.4% chance of exploitation in 30 days – higher than 35% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Base metrics

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

Threat metrics

Exploit Maturity: POC

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: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
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: None: There is no loss of confidentiality within 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: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable 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.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 12 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CVSS exploit maturity: proof of concept public
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), CVSS vector, 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
cdevroe unmark	Affected 1.9.0 – 1.9.3 4 affected builds	Fixed in–

AI-suggested

First, apply strict input validation and output encoding on the 'q' parameter within the searchform.php file to neutralize malicious scripts. If modifying source code is not feasible, deploy a Web Application Firewall (WAF) with custom rules to detect and block XSS payloads targeting the 'q' parameter. Additionally, enforce Content Security Policy (CSP) headers to restrict execution of unauthorized scripts in the browser context. Educate users to avoid clicking on suspicious links and monitor logs for unusual query parameter patterns indicative of exploitation attempts. Regularly update and audit unmark deployments and consider isolating the application behind VPN or internal networks to reduce exposure. Finally, maintain vigilant monitoring for any emerging patches or vendor advisories and plan for prompt application once available.

Description

A flaw has been found in cdevroe unmark up to 1.9.3. This vulnerability affects unknown code of the file application/views/layouts/topbar/searchform.php. This manipulation of the argument q causes cross site scripting. Remote exploitation of the attack is possible. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

For European organizations using cdevroe unmark versions 1.9.0 to 1.9.3, this vulnerability poses a risk primarily to web application users and administrators. Exploitation could lead to theft of session cookies, enabling unauthorized access to user accounts, or facilitate social engineering attacks such as phishing by injecting malicious scripts into the search form interface. This could undermine the integrity of user interactions and potentially expose sensitive data managed within unmark instances. Organizations relying on unmark for bookmark or link management may face reputational damage and operational disruption if attackers leverage this vulnerability to compromise user sessions or distribute malware. Given that unmark is a self-hosted or small-scale web application, the impact is more pronounced in environments where it is integrated with other internal tools or contains sensitive organizational data. The lack of vendor response and patches increases the urgency for European entities to implement mitigations. Additionally, the medium severity rating suggests that while the vulnerability is not critical, it still represents a meaningful risk, especially in sectors with strict data protection regulations such as GDPR, where any compromise of user data or session integrity can lead to compliance issues and fines.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 21 Sep 2025, 00:36 UTC

Technical details

References

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