VulnerabilityPublished 12 Oct 2025Updated 17 Oct 2025

CVE-2025-11631: RainyGao DocSys · Path Traversal

Affects RainyGao DocSysSource 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 12 Oct 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
RainyGao DocSys	Affected 2.02.0 – 2.02.36 37 affected builds	Fixed in–

AI-suggested

Immediately restrict external access to the /Doc/deleteDoc.do endpoint using network-level controls such as firewalls or VPNs.
Implement strict input validation and sanitization on the 'path' parameter to prevent directory traversal sequences (e.g., ../).
Employ web application firewalls (WAFs) with custom rules to detect and block path traversal attempts targeting DocSys endpoints.
Conduct thorough audits of file system permissions to ensure the DocSys process has minimal privileges, limiting potential damage from exploitation.
Monitor logs for unusual access patterns or repeated requests to /Doc/deleteDoc.do with suspicious path parameters.
If possible, isolate the DocSys server in a segmented network zone to reduce lateral movement risks.
Engage with the vendor for updates or patches and consider alternative document management solutions if no remediation is forthcoming.
Develop an incident response plan specific to this vulnerability, including backup and recovery procedures for critical documents.
Educate IT and security teams about this vulnerability and the importance of timely patching and monitoring.

Description

A vulnerability was determined in RainyGao DocSys up to 2.02.36. Affected by this vulnerability is an unknown functionality of the file /Doc/deleteDoc.do. Executing manipulation of the argument path can lead to path traversal. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

For European organizations using RainyGao DocSys, this vulnerability poses risks to data confidentiality and integrity. Attackers could access or delete sensitive documents, potentially leading to data breaches, loss of critical information, or disruption of document workflows. This could affect compliance with GDPR and other data protection regulations, resulting in legal and financial consequences. The ability to exploit the vulnerability remotely without user interaction or elevated privileges increases the attack surface, especially for organizations exposing DocSys to the internet or within less secure internal networks. The lack of vendor response and patches means organizations must rely on internal mitigations, increasing operational risk. Industries with high reliance on document management, such as legal, financial, healthcare, and government sectors, are particularly vulnerable. Additionally, the potential for attackers to leverage this vulnerability as a foothold for further attacks cannot be discounted, especially in environments with interconnected systems.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 19 Oct 2025, 08:57 UTC

Technical details

References

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