How severe is CVE-2018-18307?

CVE-2018-18307 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-2018-18307 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18307?

CVE-2018-18307 affects Alchemy-cms Alchemy Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18307?

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

When was CVE-2018-18307 published?

CVE-2018-18307 was published on 2018-10-16 and last updated on 2026-06-17.

CVE-2018-18307

CVE-2018-18307 is a medium-severity vulnerability in Alchemy-cms Alchemy Cms 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: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Alchemy-cms Alchemy Cms
Published: 2018-10-16
Last modified: 2026-06-17

Description

A Stored XSS vulnerability has been discovered in version 4.1.0 of AlchemyCMS via the /admin/pictures image field. NOTE: the vendor's position is that this is not a valid report: "The researcher used an authorized cookie to perform the request to a password-protected route. Without that session cookie, the request would have been rejected as unauthorized."

Frequently asked questions

What is CVE-2018-18307?: A Stored XSS vulnerability has been discovered in version 4.1.0 of AlchemyCMS via the /admin/pictures image field. NOTE: the vendor's position is that this is not a valid report: "The researcher used an authorized cookie to perform the request to a password-protected route. Without that session cookie, the request would have been rejected as unauthorized."
How severe is CVE-2018-18307?: CVE-2018-18307 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-2018-18307 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18307?: CVE-2018-18307 affects Alchemy-cms Alchemy Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18307?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-18307 published?: CVE-2018-18307 was published on 2018-10-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:alchemy-cms:alchemy_cms:4.1.0:*:*:*:*:*:*:*

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