CVE-2025-29458 — HIGH (7.6)

Vulnerability Description

An issue in MyBB 1.8.38 allows a remote attacker to obtain sensitive information via the Change Avatar function. NOTE: the Supplier disputes this because of the allowed actions of Board administrators and because of SSRF mitigation.

CVSS Score

7.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

LOW

Availability

LOW

Affected Products

Vendor	Product	Versions
Mybb	Mybb	1.8.38

Related Weaknesses (CWE)

CWE-918

References

https://docs.mybb.com/1.8/administration/security/protection/#limit-access-to-prMitigationProduct
https://www.yuque.com/morysummer/vx41bz/qu7zyyxr84qno64eExploitThird Party Advisory

FAQ

What is CVE-2025-29458?

CVE-2025-29458 is a vulnerability with a CVSS score of 7.6 (HIGH). An issue in MyBB 1.8.38 allows a remote attacker to obtain sensitive information via the Change Avatar function. NOTE: the Supplier disputes this because of the allowed actions of Board administrators...

How severe is CVE-2025-29458?

CVE-2025-29458 has been rated HIGH with a CVSS base score of 7.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-29458?

Check the references section above for vendor advisories and patch information. Affected products include: Mybb Mybb.