CVE-2019-25776: Weaver E-cology SQL Injection Vulnerability

CVE-2019-25776 Overview

CVE-2019-25776 is an unauthenticated SQL injection vulnerability [CWE-89] in Weaver E-cology, a Chinese enterprise collaboration and office automation platform. The flaw resides in the mobile plugin endpoint syncUserInfo.jsp and is reachable through the userIdentifiers GET parameter. Remote attackers can send crafted HTTP requests to execute arbitrary SQL queries against the backend database. The endpoint applies a space-based input filter, but attackers bypass it by wrapping SQL keywords in parentheses to construct UNION-based payloads. Successful exploitation returns sensitive data, including administrator credential hashes. The Shadowserver Foundation first observed exploitation attempts on 2022-07-28.

Critical Impact
Unauthenticated attackers can extract administrator password hashes and arbitrary database contents from exposed Weaver E-cology deployments over the network.

Affected Products

Weaver E-cology (mobile plugin syncUserInfo.jsp endpoint)
Deployments exposing the mobile plugin to untrusted networks
Legacy Weaver E-cology installations without the vendor's security patch applied

Discovery Timeline

2022-07-28 - Shadowserver Foundation observed first in-the-wild exploitation attempts
2026-09-18 - CVE-2019-25776 published to NVD
2026-09-22 - Last updated in NVD database

Technical Details for CVE-2019-25776

Vulnerability Analysis

The vulnerability exists in the mobile plugin's syncUserInfo.jsp handler, which accepts a userIdentifiers GET parameter and concatenates it into a backend SQL statement. Because the value is placed directly into the query, an attacker can alter the statement's structure. The endpoint requires no authentication, so any client that can reach the HTTP interface can trigger the flaw. Extracted data typically includes rows from the user table, exposing administrator credential hashes that can be cracked offline. Once a valid administrator hash is recovered, attackers can pivot to authenticated features and expand access across the collaboration platform.

Root Cause

The root cause is improper neutralization of special elements used in an SQL command [CWE-89]. The application concatenates the userIdentifiers parameter directly into a query rather than using parameterized statements or a prepared-statement API. A secondary defect is the reliance on a blocklist that strips or blocks whitespace characters instead of validating input types and structure. Blocklists on syntax alone are insufficient because SQL grammar permits alternative token separators.

Attack Vector

The attack vector is network-based and unauthenticated. An attacker issues an HTTP GET request to the mobile plugin endpoint with a malicious userIdentifiers value. To evade the whitespace filter, the payload wraps SQL keywords such as UNION, SELECT, and FROM in parentheses, replacing spaces with /**/ comments or grouping constructs. A UNION-based payload appends attacker-controlled columns to the original result set, returning data such as hrmresourcemanager credential fields directly in the HTTP response. Public proof-of-concept templates for this technique are available in the Xray scanner project. See the VulnCheck Security Advisory and the GitHub PoC for Xray for technical details.

Detection Methods for CVE-2019-25776

Indicators of Compromise

HTTP GET requests to paths containing syncUserInfo.jsp with a userIdentifiers parameter carrying SQL syntax
Request payloads containing UNION, SELECT, or FROM tokens wrapped in parentheses or separated by /**/ comment sequences
Repeated requests from a single source enumerating tables such as hrmresourcemanager
Application or database logs showing UNION queries returning credential hash columns

Detection Strategies

Deploy WAF or reverse-proxy signatures that inspect userIdentifiers values for SQL keywords, comment sequences, and parenthesis-wrapped tokens
Enable database query logging on the E-cology backend and alert on UNION queries originating from the mobile plugin service account
Baseline normal syncUserInfo.jsp request patterns and flag deviations in parameter length or character set

Monitoring Recommendations

Forward web server, application, and database logs to a central analytics platform for correlation
Track outbound egress from the E-cology host for unexpected credential exfiltration to external destinations
Monitor administrator account activity for anomalous logins following any suspicious syncUserInfo.jsp traffic

How to Mitigate CVE-2019-25776

Immediate Actions Required

Restrict network access to the Weaver E-cology mobile plugin endpoint to trusted internal ranges and VPN clients only
Apply the vendor's latest security patches as listed in the Weaver Ecosystem Log
Rotate all administrator and privileged account credentials, assuming hashes may have been exfiltrated
Review web and database logs for prior exploitation attempts dating back to at least 2022-07-28

Patch Information

Weaver publishes cumulative security fixes for E-cology in its ecosystem changelog. Administrators should upgrade to the latest supported release documented in the Weaver Ecosystem Log and confirm that fixes covering the syncUserInfo.jsp handler are present. Consult the VulnCheck Security Advisory for version guidance.

Workarounds

Block external access to URLs matching /*/syncUserInfo.jsp at the perimeter until patches are deployed
Add a WAF rule that rejects requests where userIdentifiers contains SQL keywords, parentheses combined with SELECT, or /**/ sequences
Disable the mobile plugin module in E-cology if it is not required for business operations

bash

# Example NGINX rule blocking access to the vulnerable endpoint
location ~* /syncUserInfo\.jsp$ {
    allow 10.0.0.0/8;
    deny all;
    return 403;
}