How severe is CVE-2023-27757?

CVE-2023-27757 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-2023-27757 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-27757?

CVE-2023-27757 affects Perfree Perfreeblog. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-27757?

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-2023-27757 published?

CVE-2023-27757 was published on 2023-03-15 and last updated on 2026-06-17.

CVE-2023-27757

CVE-2023-27757 is a critical-severity vulnerability in Perfree Perfreeblog 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Perfree Perfreeblog
Published: 2023-03-15
Last modified: 2026-06-17

Description

An arbitrary file upload vulnerability in the /admin/user/uploadImg component of PerfreeBlog v3.1.1 allows attackers to execute arbitrary code via a crafted JPG file.

Frequently asked questions

What is CVE-2023-27757?: An arbitrary file upload vulnerability in the /admin/user/uploadImg component of PerfreeBlog v3.1.1 allows attackers to execute arbitrary code via a crafted JPG file.
How severe is CVE-2023-27757?: CVE-2023-27757 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-2023-27757 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-27757?: CVE-2023-27757 affects Perfree Perfreeblog. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-27757?: 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-2023-27757 published?: CVE-2023-27757 was published on 2023-03-15 and last updated on 2026-06-17.

References

https://github.com/perfree/PerfreeBlog/issues/13

Affected products (1)

cpe:2.3:a:perfree:perfreeblog:3.1.1:*:*:*:*:*:*:*

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