CVE-2021-3337 in the critical feed json
The Hide-Thread-Content plugin through 2021-01-27 for MyBB allows remote attackers to bypass intended content-reading restrictions by click…
published 2021-01-28 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26668
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 11.6%
- EPSS 11.6% chance of exploitation in 30 days, percentile 96%
- public exploits
- 1
- Exploit-DB
Summary
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.
Timeline
- Published
- First public exploit (EDB-49496)
Exploit prediction
11.60% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-49496 MyBB Hide Thread Content Plugin 1.0 - Information Disclosure webapps, 2021-01-29
- github.com https://github.com/snlbaral/Hide-Thread-Content/issues/1 referenced PoC, tagged "exploit" by a source, unverified
- packetstormsecurity.com http://packetstormsecurity.com/files/161185/MyBB-Hide-Thread-Content-1.0-Information-Disclosure.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/snlbaral/Hide-Thread-Content/issues/1
exploit, third-party-advisory
-
packetstormsecurity.com
/files/161185/MyBB-Hide-Thread-Content-1.0-Information-Disclosure.html
exploit, third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-3337
- NVD CVE-2021-3337
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.