CVE-2021-43430
An Access Control vulnerability exists in BigAntSoft BigAnt office messenger 5.6 via im_webserver...
An Access Control vulnerability exists in BigAntSoft BigAnt office messenger 5.6 via im_webserver, which could let a malicious user upload PHP Trojan files.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An Access Control vulnerability exists in BigAntSoft BigAnt office messenger 5.6 via im_webserver, which could let a malicious user upload PHP Trojan files.
- Record
CVE-2021-43430- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-434
- Updated
- 2026-11-02
CVE List No score
An Access Control vulnerability exists in BigAntSoft BigAnt office messenger 5.6 via im_webserver, which could let a malicious user upload PHP Trojan files.
- Record
CVE-2021-43430- Updated
- 2026-11-02
EUVDEUVD-2021-30363 No score
An Access Control vulnerability exists in BigAntSoft BigAnt office messenger 5.6 via im_webserver, which could let a malicious user upload PHP Trojan files.
- Record
EUVD-2021-30363- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xw8x-6f24-54jx
An Access Control vulnerability exists in BigAntSoft BigAnt office messenger 5.6 via im_webserver...
An Access Control vulnerability exists in BigAntSoft BigAnt office messenger 5.6 via im_webserver, which could let a malicious user upload PHP Trojan files.
- Record
GHSA-xw8x-6f24-54jx- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-434
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-43430 is a high vulnerability (CVSS 8.8) in Bigantsoft Bigant Office Messenger 5, published April 7, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.15%, the 66th percentile. No source names a fixed version.