What is the CVSS score of CVE-2025-29457?

CVE-2025-29457 has a CVSS 3.1 base score of 7.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L. EPSS exploitation probability: 0.7%.

Which versions of Mybb are affected by CVE-2025-29457?

CVE-2025-29457 presents notable security risk, a server-side request forgery vulnerability rated CVSS 7.6.

Is there a public PoC exploit available for CVE-2025-29457?

Yes, a public proof-of-concept exploit is available for CVE-2025-29457. Prioritise patching immediately. EPSS: 0.7%.

How to fix or mitigate CVE-2025-29457?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Implement egress filtering and URL validation for server-side requests.

Mybb CVE-2025-29457

HIGH

Server-Side Request Forgery (SSRF) (CWE-918)

2025-04-17 cve@mitre.org

SSRF Mybb

7.6

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.6 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:37 vuln.today

PoC Detected

Apr 24, 2025 - 14:13 vuln.today

Public exploit code

CVE Published

Apr 17, 2025 - 22:15 nvd

HIGH 7.6

DescriptionCVE.org

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.

AnalysisAI

An issue in MyBB 1.8.38 allows a remote attacker to obtain sensitive information via the Import a Theme function. Rated high severity (CVSS 7.6), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Server-Side Request Forgery (SSRF) (CWE-918), which allows attackers to make the server perform requests to unintended internal or external resources. 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. Affected products include: Mybb.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate and allowlist destination URLs, block requests to internal networks, use network segmentation.