How severe is CVE-2025-29459?

CVE-2025-29459 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.

Is CVE-2025-29459 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-29459?

CVE-2025-29459 affects Mybb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-29459?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-29459 have an EU (EUVD) identifier?

Yes. CVE-2025-29459 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-11803.

When was CVE-2025-29459 published?

CVE-2025-29459 was published on 2025-04-17 and last updated on 2026-06-17.

CVE-2025-29459

CVE-2025-29459 is a high-severity vulnerability in Mybb with a CVSS 3.x base score of 7.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: High (CVSS 3.x base score 7.6)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-11803
Weakness: CWE-918
Affected product: Mybb
Published: 2025-04-17
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2025-29459?: An issue in MyBB 1.8.38 allows a remote attacker to obtain sensitive information via the Mail function. NOTE: the Supplier disputes this because of the allowed actions of Board administrators and because of SSRF mitigation.
How severe is CVE-2025-29459?: CVE-2025-29459 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.
Is CVE-2025-29459 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-29459?: CVE-2025-29459 affects Mybb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-29459?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-29459 have an EU (EUVD) identifier?: Yes. CVE-2025-29459 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-11803.
When was CVE-2025-29459 published?: CVE-2025-29459 was published on 2025-04-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mybb:mybb:1.8.38:*:*:*:*:*:*:*

More vulnerabilities in Mybb

CVE-2015-8974 — Critical (CVSS 10.0): SQL injection vulnerability in the Group Promotions module in the admin control panel in MyBB (aka MyBulletinBoard)…
CVE-2015-2786 — Critical (CVSS 10.0): Unspecified vulnerability in MyBB (aka MyBulletinBoard) before 1.8.4 has unknown attack vectors related to "Group join…
CVE-2011-5133 — Critical (CVSS 10.0): Unspecified vulnerability in MyBB before 1.6.5 has unknown impact and attack vectors, related to an "unparsed user…
CVE-2006-0218 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in MyBulletinBoard (MyBB) before 1.0.2 have unspecified impact and attack vectors,…
CVE-2011-10018 — Critical (CVSS 9.8): myBB version 1.6.4 was distributed with an unauthorized backdoor embedded in the source code. The backdoor allowed…
CVE-2020-22612 — Critical (CVSS 9.8): Installer RCE on settings file write in MyBB before 1.8.22.

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