CVE-2023-53922: TinyWebGallery v2.5 contains a remote code execution vulnerability in the admin upload functionality that allo

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2023-53922 is a critical-severity flaw (CVSS 9.8) affecting tinywebgallery. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

TinyWebGallery v2.5 contains a remote code execution vulnerability in the admin upload functionality that allows unauthenticated attackers to upload malicious PHP files. Attackers can upload .phar files with embedded system commands to execute arbitrary code on the server by accessing the uploaded file's URL.

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-434
Published	2025-12-17
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: tinywebgallery

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

Am I affected?

Timeline

2025-12-17 23:15 UTCPublished CVE record published
2026-06-17 06:46 UTCUpdated Record last modified

tinywebgallery tinywebgallery DOWNGRADE

Affected: 2.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.5 (Debian / Ubuntu)

apt-cache madison tinywebgallery sudo apt install tinywebgallery=<VERSION_BEFORE_2.5> sudo apt-mark hold tinywebgallery

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

dnf --showduplicates list tinywebgallery sudo dnf downgrade tinywebgallery-<VERSION_BEFORE_2.5> sudo dnf versionlock add tinywebgallery

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · conan · FIXED · 2.31.0-1.fc46 · FEDORA-2026-ba58084ab5 · source

sudo dnf upgrade --advisory=FEDORA-2026-ba58084ab5

Fedora ELN · tesseract · FIXED · 5.5.4-1.eln159 · FEDORA-2026-866cf60ee6 · source

sudo dnf upgrade --advisory=FEDORA-2026-866cf60ee6

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: www.exploit-db.com/exploits/51443

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-2023-53922?

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

Is CVE-2023-53922 being exploited?

CVE-2023-53922 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-2023-53922 affect?

CVE-2023-53922 affects tinywebgallery. Severity is critical (CVSS 9.8). TinyWebGallery v2.5 contains a remote code execution vulnerability in the admin upload functionality that allows unauthenticated attackers to upload malicious PHP files. Attackers can upload .phar files with embedded system commands to exec

How urgent is CVE-2023-53922?

Priority 64/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2023-53939 MEDIUM 5.4 DOWNGRADE TinyWebGallery v2.5 contains a stored cross-site scripting vulnerability that allows authenticated attackers t

References

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