CVE-2025-29457 json
An issue in MyBB 1.8.38 allows a remote attacker to obtain sensitive information via the Import a Theme function.
published 2025-04-17 18 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-11804
- cvss
- 7.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 38%
- public exploits
- 0
- none known
Summary
An issue in MyBB 1.8.38 allows a remote attacker to obtain sensitive information via the Import a Theme function. NOTE: the Supplier disputes this because of the allowed actions of Board administrators and because of SSRF mitigation.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- yuque.com https://www.yuque.com/morysummer/vx41bz/vro4dvxzuiwlg6uv referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L |
| CNA | 3.1 | 7.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L |
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
yuque.com
/morysummer/vx41bz/vro4dvxzuiwlg6uv
exploit, third-party-advisory
-
docs.mybb.com
/1.8/administration/security/protection/#limit-access-to-private-hosts-and-ip-addresses
mitigation, product
Sources
- CVE List CVE-2025-29457
- NVD CVE-2025-29457
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.