How severe is CVE-2018-19557?

CVE-2018-19557 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-19557 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-19557?

CVE-2018-19557 affects Arcms Project Arcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-19557?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-19557 published?

CVE-2018-19557 was published on 2018-11-26 and last updated on 2026-06-17.

CVE-2018-19557

CVE-2018-19557 is a critical-severity vulnerability in Arcms Project Arcms with a CVSS 3.x base score of 9.8. 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-89.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Arcms Project Arcms
Published: 2018-11-26
Last modified: 2026-06-17

Description

An issue was discovered in arcms through 2018-03-19. No authentication is required for index/main, user/useradd, or img/images.

Frequently asked questions

What is CVE-2018-19557?: An issue was discovered in arcms through 2018-03-19. No authentication is required for index/main, user/useradd, or img/images.
How severe is CVE-2018-19557?: CVE-2018-19557 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-19557 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-19557?: CVE-2018-19557 affects Arcms Project Arcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-19557?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-19557 published?: CVE-2018-19557 was published on 2018-11-26 and last updated on 2026-06-17.

References

https://github.com/assnr/arcms/issues/1

Affected products (1)

cpe:2.3:a:arcms_project:arcms:*:*:*:*:*:*:*:*

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