How severe is CVE-2023-4878?

CVE-2023-4878 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 no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-4878 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-4878?

CVE-2023-4878 affects Instantcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-4878?

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

When was CVE-2023-4878 published?

CVE-2023-4878 was published on 2023-09-10 and last updated on 2026-06-17.

CVE-2023-4878

CVE-2023-4878 is a medium-severity vulnerability in Instantcms 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-918.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Instantcms
Published: 2023-09-10
Last modified: 2026-06-17

Description

Server-Side Request Forgery (SSRF) in GitHub repository instantsoft/icms2 prior to 2.16.1-git.

Frequently asked questions

What is CVE-2023-4878?: Server-Side Request Forgery (SSRF) in GitHub repository instantsoft/icms2 prior to 2.16.1-git.
How severe is CVE-2023-4878?: CVE-2023-4878 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 no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-4878 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-4878?: CVE-2023-4878 affects Instantcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-4878?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-4878 published?: CVE-2023-4878 was published on 2023-09-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:instantcms:instantcms:*:*:*:*:*:*:*:*

More vulnerabilities in Instantcms

CVE-2013-10051 — Critical (CVSS 9.8): A remote PHP code execution vulnerability exists in InstantCMS version 1.6 and earlier due to unsafe use of eval()…
CVE-2023-4188 — Critical (CVSS 9.1): SQL Injection in GitHub repository instantsoft/icms2 prior to 2.16.1-git.
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CVE-2024-31212 — Medium (CVSS 6.7): InstantCMS is a free and open source content management system. A SQL injection vulnerability affects instantcms…
CVE-2023-4655 — Medium (CVSS 6.1): Cross-site Scripting (XSS) - Reflected in GitHub repository instantsoft/icms2 prior to 2.16.1.
CVE-2018-14382 — Medium (CVSS 6.1): InstantCMS 2.10.1 has /redirect?url= XSS.

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