VDB-290160 · CVE-2025-21609 · Nessus 213966

SiYuan 3.1.18 getDocHistoryContent cleanup

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.6	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in SiYuan 3.1.18. This affects an unknown part of the file /api/history/getDocHistoryContent. The manipulation results in cleanup. This vulnerability is known as CVE-2025-21609. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in SiYuan 3.1.18. Affected is an unknown part of the file /api/history/getDocHistoryContent. The manipulation with an unknown input leads to a cleanup vulnerability. CWE is classifying the issue as CWE-459. The product does not properly "clean up" and remove temporary or supporting resources after they have been used. This is going to have an impact on integrity, and availability. CVE summarizes:

SiYuan is self-hosted, open source personal knowledge management software. SiYuan Note version 3.1.18 has an arbitrary file deletion vulnerability. The vulnerability exists in the `POST /api/history/getDocHistoryContent` endpoint. An attacker can craft a payload to exploit this vulnerability, resulting in the deletion of arbitrary files on the server. Commit d9887aeec1b27073bec66299a9a4181dc42969f3 fixes this vulnerability and is expected to be available in version 3.1.19.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2025-21609 since 12/29/2024. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 213966 (SUSE SLES15 / openSUSE 15 Security Update : govulncheck-vulndb (SUSE-SU-2025:0060-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.1.19 eliminates this vulnerability. Applying the patch d9887aeec1b27073bec66299a9a4181dc42969f3 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (213966). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

SiYuan

Version

3.1.18

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Cleanup
CWE: CWE-459
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 213966
Nessus Name: SUSE SLES15 / openSUSE 15 Security Update : govulncheck-vulndb (SUSE-SU-2025:0060-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: SiYuan 3.1.19
Patch: d9887aeec1b27073bec66299a9a4181dc42969f3

Timelineinfo

12/29/2024 🔍
01/03/2025 +5 days 🔍
01/03/2025 +0 days 🔍
05/14/2025 +131 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2025-21609 (🔍)
GCVE (CVE): GCVE-0-2025-21609
GCVE (VulDB): GCVE-100-290160

Entryinfo

Created: 01/03/2025 17:44
Updated: 05/14/2025 17:08
Changes: 01/03/2025 17:44 (66), 01/13/2025 19:12 (2), 05/14/2025 17:08 (12)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.