How severe is CVE-2017-8104?

CVE-2017-8104 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2017-8104 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-8104?

CVE-2017-8104 affects Mybb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-8104?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-8104 published?

CVE-2017-8104 was published on 2017-04-24 and last updated on 2026-06-17.

CVE-2017-8104

CVE-2017-8104 is a medium-severity vulnerability in Mybb with a CVSS 3.x base score of 5.3. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Mybb
Published: 2017-04-24
Last modified: 2026-06-17

Description

In MyBB before 1.8.11, the smilie module allows Directory Traversal via the pathfolder parameter.

Frequently asked questions

What is CVE-2017-8104?: In MyBB before 1.8.11, the smilie module allows Directory Traversal via the pathfolder parameter.
How severe is CVE-2017-8104?: CVE-2017-8104 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2017-8104 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-8104?: CVE-2017-8104 affects Mybb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-8104?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-8104 published?: CVE-2017-8104 was published on 2017-04-24 and last updated on 2026-06-17.

References

Affected products (1)

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

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