CVE-2025-6534VulnerabilityPublished 24 Jun 2025Updated 25 Jun 2025

CVE-2025-6534: xxyopen novel-plus · Improper Control of Resource Identifiers

Affects xxyopen novel-plusSource CVE Database V5

Not known to be exploited · CVSS 2.3 Low.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 4.0 base score

2.3Low

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

EPSS: 0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Base metrics

Attack Vector: Network
Attack Complexity: High
Attack Requirements: None
Privileges Required: Low
User Interaction: None
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: Low
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: High: The successful attack depends on the evasion or circumvention of security-enhancing techniques in place that would otherwise hinder the attack. These include: Evasion of exploit mitigation techniques, for example, circumvention of address space randomization (ASLR) or data execution prevention (DEP) must be performed for the attack to be successful; Obtaining target-specific secrets. The attacker must gather some target-specific secret before the attack can be successful. A secret is any piece of information that cannot be obtained through any amount of reconnaissance. To obtain the secret the attacker must perform additional attacks or break otherwise secure measures (e.g. knowledge of a secret key may be needed to break a crypto channel). This operation must be performed for each attacked target.
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: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
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: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the Vulnerable System are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to 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 24 Jun 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 2026-10-26.

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
xxyopen novel-plus	Affected =5.1.0 =5.1.1 =5.1.2 =5.1.3	Fixed in–

AI-suggested

Given the absence of an official patch from the vendor, European organizations should implement compensating controls to mitigate this vulnerability. First, restrict network access to the novel-plus application, ensuring it is not exposed to untrusted networks or the internet. Use network segmentation and firewall rules to limit access only to trusted internal users. Second, implement strict access controls and monitoring on the file system level to detect and prevent unauthorized file deletions or modifications, including the use of file integrity monitoring tools. Third, conduct regular audits of application logs and file system changes to identify suspicious activity related to file removal operations. Fourth, consider deploying a Web Application Firewall (WAF) with custom rules to detect and block suspicious requests targeting the 'remove' function or unusual resource identifier patterns. Fifth, if feasible, upgrade to a later version of novel-plus once the vendor releases a patch or consider alternative software solutions with active security support. Finally, maintain an incident response plan to quickly address any exploitation attempts and ensure backups are current and tested to recover from potential data loss.

Description

A vulnerability, which was classified as problematic, was found in xxyopen/201206030 novel-plus up to 5.1.3. This affects the function remove of the file novel-admin/src/main/java/com/java2nb/common/controller/FileController.java of the component File Handler. The manipulation leads to improper control of resource identifiers. It is possible to initiate the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

For European organizations using xxyopen novel-plus versions 5.1.0 to 5.1.3, this vulnerability poses a risk of unauthorized file deletion or manipulation, which could disrupt business operations or lead to partial data loss. Although the severity is low and exploitation is difficult, the lack of vendor response and patch availability increases the risk profile over time. Organizations relying on novel-plus for critical document or content management may face integrity and availability issues if an attacker manages to exploit this flaw. The limited impact on confidentiality reduces the risk of sensitive data leakage, but the potential for file removal could affect service continuity. Since the attack can be initiated remotely without user interaction, exposed instances accessible over the internet or untrusted networks are at higher risk. European entities in sectors such as publishing, education, or digital content management that deploy novel-plus might experience operational disruptions. However, the overall impact is mitigated by the high attack complexity and the low CVSS score.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 24 Jun 2025, 00:54 UTC

Technical details

References

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