CVE-2021-35261

CRITICALNVD 9.89.8—Elevated

9.8

File Upload Vulnerability in Yupoxion BearAdmin before commit 10176153528b0a914eb4d726e200fd506b73b075 allows attacker to execute arbitrary remote code via the Upfile function of the extend/tools/Ueditor endpoint.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 57.2%
KEV: Not listed

Published

February 17, 2023

Last Modified

March 18, 2025

Advisory Details (1)

Auto-updated Jun 3, 2026

No patch confirmed yet.

generic

Unrestrict File Upload to RCE vulnerability Find in BearAdmin · Issue #16 · yupoxiong/BearAdmin · GitHub

https://github.com/yupoxiong/BearAdmin/issues/16

Weakness Classification(1)

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

CWE-434Unrestricted Upload of File with Dangerous Type

Data Freshness Timeline

(refreshed 12× in last 7d / 20× 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.

2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 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
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 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
2026-05-27 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

Frequently asked(5)

What is CVE-2021-35261?

CVE-2021-35261 is a critical vulnerability published on February 17, 2023. File Upload Vulnerability in Yupoxion BearAdmin before commit 10176153528b0a914eb4d726e200fd506b73b075 allows attacker to execute arbitrary remote code via the Upfile function of the extend/tools/Ueditor endpoint.

When was CVE-2021-35261 disclosed?

CVE-2021-35261 was first published in the National Vulnerability Database on February 17, 2023, with the most recent update on March 18, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-35261 actively exploited?

CVE-2021-35261 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 57.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-35261?

CVE-2021-35261 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-35261?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-35261, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-35261

Explore →

Is Your Infrastructure Affected by CVE-2021-35261?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2021-35261

📅 Published

🔄 Last Modified

📋 Advisory Details (1)

Unrestrict File Upload to RCE vulnerability Find in BearAdmin · Issue #16 · yupoxiong/BearAdmin · GitHub

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-35261?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

Advisory Details (1)

Frequently asked(5)

Related CVEs(same CWE)