CVE-2025-52353: An arbitrary code execution vulnerability in Badaso CMS 2.9.11

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2025-52353 is a critical-severity flaw (CVSS 9.8) affecting badaso. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An arbitrary code execution vulnerability in Badaso CMS 2.9.11. The Media Manager allows authenticated users to upload files containing embedded PHP code via the file-upload endpoint, bypassing content-type validation. When such a file is accessed via its URL, the server executes the PHP payload, enabling an attacker to run arbitrary system commands and achieve full compromise of the underlying host. This has been demonstrated by embedding a back

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	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-434
Published	2025-08-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: uatech

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

Am I affected?

Timeline

2025-08-26 20:15 UTCPublished CVE record published
2026-06-17 09:36 UTCUpdated Record last modified

uatech badaso DOWNGRADE

Affected: 2.9.11

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.9.11

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.9.11 (Debian / Ubuntu)

apt-cache madison badaso sudo apt install badaso=<VERSION_BEFORE_2.9.11> sudo apt-mark hold badaso

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list badaso sudo dnf downgrade badaso-<VERSION_BEFORE_2.9.11> sudo dnf versionlock add badaso

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2025-52353?

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

Is CVE-2025-52353 being exploited?

CVE-2025-52353 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-2025-52353 affect?

CVE-2025-52353 affects badaso. Severity is critical (CVSS 9.8). An arbitrary code execution vulnerability in Badaso CMS 2.9.11. The Media Manager allows authenticated users to upload files containing embedded PHP code via the file-upload endpoint, bypassing content-type validation. When such a file is a

How urgent is CVE-2025-52353?

Priority 57/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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