How severe is CVE-2018-18678?

CVE-2018-18678 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-18678 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18678?

CVE-2018-18678 affects Sir Gnuboard. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18678?

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

When was CVE-2018-18678 published?

CVE-2018-18678 was published on 2019-10-30 and last updated on 2026-06-17.

CVE-2018-18678

CVE-2018-18678 is a medium-severity vulnerability in Sir Gnuboard with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Sir Gnuboard
Published: 2019-10-30
Last modified: 2026-06-17

Description

GNUBOARD5 before 5.3.2.0 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "board group extra contents" parameter, aka the adm/boardgroup_form_update.php gr_1~10 parameter.

Frequently asked questions

What is CVE-2018-18678?: GNUBOARD5 before 5.3.2.0 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "board group extra contents" parameter, aka the adm/boardgroup_form_update.php gr_1~10 parameter.
How severe is CVE-2018-18678?: CVE-2018-18678 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-18678 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18678?: CVE-2018-18678 affects Sir Gnuboard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18678?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-18678 published?: CVE-2018-18678 was published on 2019-10-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sir:gnuboard:*:*:*:*:*:*:*:*

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