How severe is CVE-2018-1999008?

CVE-2018-1999008 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-1999008 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1999008?

CVE-2018-1999008 affects Octobercms October. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1999008?

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

When was CVE-2018-1999008 published?

CVE-2018-1999008 was published on 2018-07-23 and last updated on 2026-06-17.

CVE-2018-1999008

CVE-2018-1999008 is a medium-severity vulnerability in Octobercms October with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Octobercms October
Published: 2018-07-23
Last modified: 2026-06-17

Description

October CMS version prior to build 437 contains a Cross Site Scripting (XSS) vulnerability in the Media module and create folder functionality that can result in an Authenticated user with media module permission creating arbitrary folder name with XSS content. This attack appear to be exploitable via an Authenticated user with media module permission who can create arbitrary folder name (XSS). This vulnerability appears to have been fixed in build 437.

Frequently asked questions

What is CVE-2018-1999008?: October CMS version prior to build 437 contains a Cross Site Scripting (XSS) vulnerability in the Media module and create folder functionality that can result in an Authenticated user with media module permission creating arbitrary folder name with XSS content. This attack appear to be exploitable via an Authenticated user with media module permission who can create arbitrary folder name (XSS). This vulnerability appears to have been fixed in build 437.
How severe is CVE-2018-1999008?: CVE-2018-1999008 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-1999008 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1999008?: CVE-2018-1999008 affects Octobercms October. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1999008?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-1999008 published?: CVE-2018-1999008 was published on 2018-07-23 and last updated on 2026-06-17.

References

https://octobercms.com/support/article/rn-10

Affected products (1)

cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:*

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