VulnerabilityPublished 14 Jul 2025

CVE-2025-7628: YiJiuSmile kkFileViewOfficeEdit · Path Traversal

Affects YiJiuSmile kkFileViewOfficeEditSource 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: 0.8% chance of exploitation in 30 days – higher than 56% 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:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Base metrics

Attack Vector: Network
Attack Complexity: Low
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: 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: 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 14 Jul 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

AI-suggested

Immediate mitigation should include restricting access to the /deleteFile endpoint through network controls such as firewalls or VPNs to limit exposure to trusted users only.
Implement strict input validation and sanitization on the fileName parameter to prevent directory traversal sequences (e.g., ../) from being processed.
Employ application-layer access controls to ensure that users can only delete files within their authorized directories.
Monitor logs for suspicious deleteFile requests that include unusual path patterns or attempts to access parent directories.
If possible, deploy web application firewalls (WAFs) with rules targeting path traversal attack signatures to block malicious requests.
Coordinate with YiJiuSmile for updates or patches, and apply them promptly once available, even if versioning is unclear due to rolling releases.
Conduct a thorough audit of file permissions and backups to ensure rapid recovery in case of file deletion.
Educate system administrators about the vulnerability and encourage regular security reviews of deployed kkFileViewOfficeEdit instances.

Description

A vulnerability was found in YiJiuSmile kkFileViewOfficeEdit up to 5fbc57c48e8fe6c1b91e0e7995e2d59615f37abd. It has been classified as critical. This affects the function deleteFile of the file /deleteFile. The manipulation of the argument fileName leads to path traversal. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available.

Impact

For European organizations using YiJiuSmile kkFileViewOfficeEdit, this vulnerability poses a risk of unauthorized file deletions that could disrupt business operations, especially if critical documents or configuration files are deleted. The path traversal nature of the vulnerability could allow attackers to delete files outside the intended directory, potentially affecting system stability and data integrity. Organizations relying on kkFileViewOfficeEdit for document management or office file editing may face operational downtime or data loss, impacting productivity and potentially leading to compliance issues under regulations like GDPR if data availability or integrity is compromised. Since the vulnerability can be exploited remotely without user interaction, exposed internet-facing instances are particularly at risk. The medium severity rating suggests that while the vulnerability is serious, it may not lead to full system compromise or data exfiltration, but the potential for service disruption and data loss remains significant. European organizations should assess their exposure, especially those in sectors with high reliance on document management systems such as finance, legal, and public administration.

Summary

CVE-2025-7628 is a path traversal vulnerability identified in the YiJiuSmile kkFileViewOfficeEdit product, specifically affecting the deleteFile function accessible via the /deleteFile endpoint. The vulnerability arises from improper validation or sanitization of the fileName parameter, which an attacker can manipulate to traverse directories and potentially delete arbitrary files on the server. This flaw allows remote attackers to craft requests that specify file paths outside the intended directory scope, leading to unauthorized file deletions. The vulnerability is classified as medium severity with a CVSS 4.0 base score of 5.3, reflecting its network attack vector, low attack complexity, no user interaction, and limited impact on confidentiality, integrity, and availability. The vulnerability does not require authentication but does require low privileges (PR:L), indicating that some level of access is needed to exploit it. The product uses a rolling release model, so specific patched versions are not clearly identified, complicating mitigation efforts. Although no known exploits are currently reported in the wild, public disclosure increases the risk of exploitation. The vulnerability impacts the integrity and availability of the affected system by enabling unauthorized deletion of files, which could disrupt service or lead to data loss. The lack of scope change means the impact is confined to the affected component without broader system compromise. The vulnerability's exploitation requires sending crafted requests remotely, making it a significant risk for exposed deployments of kkFileViewOfficeEdit.

References

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 14 Jul 2025, 18:31 UTC

Technical details

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