CVE-2023-26775: File Upload vulnerability found in Monitorr v.1.7.6 allows a remote attacker t oexecute arbitrary code via a c

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HIGH 7.8DOWNGRADE

CVE-2023-26775 is a high-severity flaw (CVSS 7.8) affecting monitorr. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

File Upload vulnerability found in Monitorr v.1.7.6 allows a remote attacker t oexecute arbitrary code via a crafted file upload to the assets/php/upload.php endpoint.

Why this priority

High severity
EPSS top 1%: very likely to be exploited

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	49.4% (top 1%)
CISA exploited list	No
Weakness	CWE-434
Published	2023-04-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: monitorr

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

Am I affected?

Timeline

2023-04-04 15:15 UTCPublished CVE record published
2026-06-17 05:43 UTCUpdated Record last modified

monitorr monitorr DOWNGRADE

Affected: 1.7.6m

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.7.6m

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.7.6m (Debian / Ubuntu)

apt-cache madison monitorr sudo apt install monitorr=<VERSION_BEFORE_1.7.6m> sudo apt-mark hold monitorr

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

dnf --showduplicates list monitorr sudo dnf downgrade monitorr-<VERSION_BEFORE_1.7.6m> sudo dnf versionlock add monitorr

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-2023-26775?

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

Is CVE-2023-26775 being exploited?

CVE-2023-26775 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-2023-26775 affect?

CVE-2023-26775 affects monitorr. Severity is high (CVSS 7.8). File Upload vulnerability found in Monitorr v.1.7.6 allows a remote attacker t oexecute arbitrary code via a crafted file upload to the assets/php/upload.php endpoint.

How urgent is CVE-2023-26775?

Priority 52/100. High severity; EPSS top 1%: very likely to be exploited

Software pages

PHP vulnerabilities

Related CVEs

CVE-2023-26776 MEDIUM 6.1 DOWNGRADE Cross Site Scripting vulnerability found in Monitorr v.1.7.6 allows a remote attacker to execute arbitrary cod

References

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