CVE-2021-35261: File Upload Vulnerability in Yupoxion BearAdmin before commit 10176153528b0a914eb4d726e200fd506b73b075 allows

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2021-35261 is a critical-severity flaw (CVSS 9.8) affecting bearadmin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-434
Published	2023-02-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bearadmin project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-02-17 18:15 UTCPublished CVE record published
2026-06-17 03:57 UTCUpdated Record last modified

bearadmin project bearadmin MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bearadmin || rpm -q bearadmin || bearadmin --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-35261?

bearadmin: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-35261 being exploited?

CVE-2021-35261 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-35261 affect?

CVE-2021-35261 affects bearadmin. Severity is critical (CVSS 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.

How urgent is CVE-2021-35261?

Priority 58/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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