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MEDIUM severity

CVE-2025-52994 — phpthumb

MEDIUMFix: JamesHeinrich/phpThumb@cdcbc20

CVE-2025-52994 is a medium-severity (CVSS 4.9) OS Command Injection vulnerability in james-heinrich/phpthumb. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

phpThumb is vulnerable to Command Injection through its gif_outputAsJpeg function

Also known asGHSA-q745-cfqh-hcrw
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-52994.

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs52th percentile — riskier than 52% of all scored CVEsHighest risk
0.00%0.40%0.80%1.19%0.2%0.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘james-heinrich/phpthumb

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

gif_outputAsJpeg in phpThumb through 1.7.23 allows phpthumb.gif.php OS Command Injection via a crafted parameter value. This is fixed in 1.7.23-202506081709.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐘Packagistjames-heinrich/phpthumball versionsNo fix

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for james-heinrich/phpthumb, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of james-heinrich/phpthumb for CVE-2025-52994. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.

Frequently Asked Questions

gif_outputAsJpeg in phpThumb through 1.7.23 allows phpthumb.gif.php OS Command Injection via a crafted parameter value. This is fixed in 1.7.23-202506081709.
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CVE-2025-52994: phpthumb (Medium 4.9)