CVE-2021-3337
The Hide-Thread-Content plugin through 2021-01-27 for MyBB allows remote attackers to bypass...
The Hide-Thread-Content plugin through 2021-01-27 for MyBB allows remote attackers to bypass intended content-reading restrictions by clicking on reply or quote in the postbit.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
The Hide-Thread-Content plugin through 2021-01-27 for MyBB allows remote attackers to bypass intended content-reading restrictions by clicking on reply or quote in the postbit.
- Record
CVE-2021-3337- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
CVE List No score
The Hide-Thread-Content plugin through 2021-01-27 for MyBB allows remote attackers to bypass intended content-reading restrictions by clicking on reply or quote in the postbit.
- Record
CVE-2021-3337- Updated
- 2026-11-02
EUVDEUVD-2021-26668 No score
The Hide-Thread-Content plugin through 2021-01-27 for MyBB allows remote attackers to bypass intended content-reading restrictions by clicking on reply or quote in the postbit.
- Record
EUVD-2021-26668- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-2486-f4hq-9m5c No score
The Hide-Thread-Content plugin through 2021-01-27 for MyBB allows remote attackers to bypass...
The Hide-Thread-Content plugin through 2021-01-27 for MyBB allows remote attackers to bypass intended content-reading restrictions by clicking on reply or quote in the postbit.
- Record
GHSA-2486-f4hq-9m5c- Weakness
- CWE-863
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | MyBB Hide Thread Content Plugin 1.0 - Information Disclosure | 2021-01-29 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-3337 is a high vulnerability (CVSS 7.5) in Hide Thread Content Project Thread Content, published January 28, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 11.6%, the 96th percentile. No source names a fixed version.