How severe is CVE-2008-4929?

CVE-2008-4929 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2008-4929 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-4929?

CVE-2008-4929 affects Mybb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-4929?

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.

When was CVE-2008-4929 published?

CVE-2008-4929 was published on 2008-11-04 and last updated on 2026-06-16.

CVE-2008-4929

CVE-2008-4929 is a high-severity vulnerability in Mybb with a CVSS 3.x base score of 7.5. 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-330.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-330
Affected product: Mybb
Published: 2008-11-04
Last modified: 2026-06-16

Description

MyBB (aka MyBulletinBoard) 1.4.2 uses insufficient randomness to compose filenames of uploaded files used as attachments, which makes it easier for remote attackers to read these files by guessing filenames.

Frequently asked questions

What is CVE-2008-4929?: MyBB (aka MyBulletinBoard) 1.4.2 uses insufficient randomness to compose filenames of uploaded files used as attachments, which makes it easier for remote attackers to read these files by guessing filenames.
How severe is CVE-2008-4929?: CVE-2008-4929 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2008-4929 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-4929?: CVE-2008-4929 affects Mybb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-4929?: 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.
When was CVE-2008-4929 published?: CVE-2008-4929 was published on 2008-11-04 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:mybb:mybb:1.4.2:*:*:*:*:*:*:*

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