CVE-2024-3705: Unrestricted file upload vulnerability in OpenGnsys affecting version 1.1.1d (Espeto)

This month

HIGH 8.8DOWNGRADE

CVE-2024-3705 is a high-severity flaw (CVSS 8.8) affecting opengnsys. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unrestricted file upload vulnerability in OpenGnsys affecting version 1.1.1d (Espeto). This vulnerability allows an attacker to send a POST request to the endpoint '/opengnsys/images/M_Icons.php' modifying the file extension, due to lack of file extension verification, resulting in a webshell injection.

Why this priority

High severity

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-434
Published	2024-04-12
Last modified	2026-06-17

Publisher (CNA): Spanish National Cybersecurity Institute, S.A. (INCIBE) · Vendor: opengnsys

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

Am I affected?

Timeline

2024-04-12 14:15 UTCPublished CVE record published
2026-06-17 07:44 UTCUpdated Record last modified

opengnsys opengnsys DOWNGRADE

Affected: 1.1.1d

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.1d

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.1.1d (Debian / Ubuntu)

apt-cache madison opengnsys sudo apt install opengnsys=<VERSION_BEFORE_1.1.1d> sudo apt-mark hold opengnsys

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

dnf --showduplicates list opengnsys sudo dnf downgrade opengnsys-<VERSION_BEFORE_1.1.1d> sudo dnf versionlock add opengnsys

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-2024-3705?

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

Is CVE-2024-3705 being exploited?

CVE-2024-3705 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-2024-3705 affect?

CVE-2024-3705 affects opengnsys. Severity is high (CVSS 8.8). Unrestricted file upload vulnerability in OpenGnsys affecting version 1.1.1d (Espeto). This vulnerability allows an attacker to send a POST request to the endpoint '/opengnsys/images/M_Icons.php' modifying the file extension, due to lack of

How urgent is CVE-2024-3705?

Priority 45/100. High severity

Software pages

PHP vulnerabilities

Related CVEs

CVE-2024-3707 MEDIUM 5.3 DOWNGRADE Information exposure vulnerability in OpenGnsys affecting version 1.1.1d (Espeto)
CVE-2024-3706 MEDIUM 5.9 DOWNGRADE Information exposure vulnerability in OpenGnsys affecting version 1.1.1d (Espeto)
CVE-2024-3704 CRITICAL 9.8 DOWNGRADE SQL Injection Vulnerability has been found on OpenGnsys product affecting version 1.1.1d (Espeto)

References

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