How severe is CVE-2021-27693?

CVE-2021-27693 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-2021-27693 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27693?

CVE-2021-27693 affects Publiccms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27693?

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-2021-27693 published?

CVE-2021-27693 was published on 2022-09-02 and last updated on 2026-06-17.

CVE-2021-27693

CVE-2021-27693 is a critical-severity vulnerability in Publiccms 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-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Publiccms
Published: 2022-09-02
Last modified: 2026-06-17

Description

Server-side Request Forgery (SSRF) vulnerability in PublicCMS before 4.0.202011.b via /publiccms/admin/ueditor when the action is catchimage.

Frequently asked questions

What is CVE-2021-27693?: Server-side Request Forgery (SSRF) vulnerability in PublicCMS before 4.0.202011.b via /publiccms/admin/ueditor when the action is catchimage.
How severe is CVE-2021-27693?: CVE-2021-27693 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-2021-27693 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27693?: CVE-2021-27693 affects Publiccms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27693?: 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-2021-27693 published?: CVE-2021-27693 was published on 2022-09-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:publiccms:publiccms:*:*:*:*:*:*:*:*

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