How severe is CVE-2018-15833?

CVE-2018-15833 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2018-15833 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-15833?

CVE-2018-15833 affects Vanillaforums Vanilla Forums. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-15833?

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

When was CVE-2018-15833 published?

CVE-2018-15833 was published on 2018-08-26 and last updated on 2026-06-17.

CVE-2018-15833

CVE-2018-15833 is a medium-severity vulnerability in Vanillaforums Vanilla Forums with a CVSS 3.x base score of 4.3. 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-639.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-639
Affected product: Vanillaforums Vanilla Forums
Published: 2018-08-26
Last modified: 2026-06-17

Description

In Vanilla before 2.6.1, the polling functionality allows Insecure Direct Object Reference (IDOR) via the Poll ID, leading to the ability of a single user to select multiple Poll Options (e.g., vote for multiple items).

Frequently asked questions

What is CVE-2018-15833?: In Vanilla before 2.6.1, the polling functionality allows Insecure Direct Object Reference (IDOR) via the Poll ID, leading to the ability of a single user to select multiple Poll Options (e.g., vote for multiple items).
How severe is CVE-2018-15833?: CVE-2018-15833 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2018-15833 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-15833?: CVE-2018-15833 affects Vanillaforums Vanilla Forums. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-15833?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-15833 published?: CVE-2018-15833 was published on 2018-08-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vanillaforums:vanilla_forums:*:*:*:*:*:*:*:*

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