CVE-2021-40180

Exp

In the WeChat application 8.0.10 for Android and iOS, a mini program can obtain sensitive information from a user's address book via wx.searchContacts.

Published: 2022-07-26 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-40180 is rated High Exploit Risk (66.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.42%). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-40180

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-40180

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.47% 0.42% -0.05%
2 2025-11-18 0.42% 0.47% +0.05%
3 2025-08-06 — 0.42% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-40180

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2021-40180

Affected software / configurations for CVE-2021-40180

Vendor Product Version Raw CPE
tencent wechat 8.0.10 cpe:2.3:a:tencent:wechat:8.0.10:*:*:*:*:android:*:*
tencent wechat 8.0.10 cpe:2.3:a:tencent:wechat:8.0.10:*:*:*:*:iphone_os:*:*

References for CVE-2021-40180

URL Tags
https://arxiv.org/pdf/2205.15202.pdf Mitigation Technical Description Third Party Advisory
https://github.com/BESTICSP/Vulnerabilities-Related-to-Mini-Programs-Permissions/blob/main/WX%20applet%20contact%20permission%20vulnerability%20report.pdf Exploit Third Party Advisory
https://pan.baidu.com/s/116sAQvs1CEzCeIfpI1NZvA Exploit Permissions Required Third Party Advisory
https://pan.baidu.com/s/1RqMrZBruZZ4OHdnXUN5xDw Exploit Permissions Required Third Party Advisory
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