CVE-2021-27693

CRITICALNVD 9.89.8—

9.8

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

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 54.9%
KEV: Not listed

Published

September 2, 2022

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated May 25, 2026

Patch available. Sources: github_commit.

generic

There is a SSRF vulnerability via /publiccms/admin/ueditor · Issue #51 · sanluan/PublicCMS · GitHub

https://github.com/sanluan/PublicCMS/issues/51

github_commit Patch Available

commit 0f4c4872914b (sanluan/PublicCMS)

Patch available: sanluan/PublicCMS V4.0.202302.a (contains commit 0f4c4872914b)

https://github.com/sanluan/PublicCMS/commit/0f4c4872914b6a71305e121a7d9a19c07cde0338

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-918Server-Side Request Forgery (SSRF)

Data Freshness Timeline

(refreshed 11× in last 7d / 18× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 16:05 UTCEG score recompute
2026-05-25 16:05 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-27693?

CVE-2021-27693 is a critical vulnerability published on September 2, 2022. Server-side Request Forgery (SSRF) vulnerability in PublicCMS before 4.0.202011.b via /publiccms/admin/ueditor when the action is catchimage.

When was CVE-2021-27693 disclosed?

CVE-2021-27693 was first published in the National Vulnerability Database on September 2, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-27693 actively exploited?

CVE-2021-27693 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 54.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-27693?

CVE-2021-27693 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-27693?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-27693, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-27693

📅 Published

🔄 Last Modified

📋 Advisory Details (2)