How severe is GHSA-m95x-m25c-w9mp?

No CVSS score has been assigned to GHSA-m95x-m25c-w9mp yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-m95x-m25c-w9mp?

GHSA-m95x-m25c-w9mp affects the following packages: phpxmlrpc/phpxmlrpc (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-m95x-m25c-w9mp?

Update phpxmlrpc/phpxmlrpc to 4.9.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-m95x-m25c-w9mp is resolved across your whole dependency graph.

How do I detect GHSA-m95x-m25c-w9mp in my Packagist dependencies?

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

How do I mitigate GHSA-m95x-m25c-w9mp if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-m95x-m25c-w9mp actively exploited in the wild?

No public exploit code has been indexed for GHSA-m95x-m25c-w9mp yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-m95x-m25c-w9mp published, and has it been updated?

GHSA-m95x-m25c-w9mp was published on January 11, 2023 and was last updated on November 28, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

XML-RPC for PHP allows access to local files via malicious argument to the Client::send methodGHSA-m95x-m25c-w9mp

Fix: gggeek/phpxmlrpc@cf6e605

GHSA-m95x-m25c-w9mp is a security vulnerability in phpxmlrpc/phpxmlrpc. A fix is available for phpxmlrpc/phpxmlrpc — see the affected versions and patch details below.

Published

Jan 11, 2023

Updated

Nov 28, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 28, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🐘phpxmlrpc/phpxmlrpc

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

Abusing the $method argument of Client::send, it was possible to force the client to access local files or connect to undesired urls instead of the intended target server's url (the one used in the Client constructor).

This weakness only affects installations where all the following conditions apply, at the same time:

the xmlrpc Client is used, ie. not xmlrpc servers
untrusted data (eg. data from remote users) is used as value for the $method argument of method Client::send(), in conjunction with conditions which trigger usage of curl as http transport (ie. either using the https, http11 or http2 protocols, or calling Client::setUseCurl() beforehand)
either have set the Clients return_type property to 'xml', or make the resulting Response's object httpResponse member, which is intended to be used for debugging purposes only, available to 3rd parties, eg. by displaying it to the end user or serializing it in some storage (note that the same data can also be accessed via magic property Response::raw_data, and in the Request's httpResponse member)

This is most likely a very uncommon usage scenario, and as such the chances of exploitation of this issue may be low.

If it is not possible to upgrade to this release of the library at this time, a proactive security measure, to avoid the Client accessing any local file on the server which hosts it, is to add the following call to your code:

  $client->setCurlOptions([CURLOPT_PROTOCOLS, CURLPROTO_HTTPS|CURLPROTO_HTTP]);

Originally reported as issue #81

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`phpxmlrpc/phpxmlrpc`	all versions	4.9.0`composer require phpxmlrpc/phpxmlrpc:^4.9.0`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for phpxmlrpc/phpxmlrpc, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update phpxmlrpc/phpxmlrpc to 4.9.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-m95x-m25c-w9mp is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Abusing the `$method` argument of Client::send, it was possible to force the client to _access local files_ or _connect to undesired urls_ instead of the intended target server's url (the one used in the Client constructor). This weakness only affects installations where all the following conditions apply, at the same time: - the xmlrpc Client is used, ie. not xmlrpc servers - untrusted data (eg. data from remote users) is used as value for the `$method` argument of method `Client::send()`, in conjunction with conditions which trigger usage of curl as http transport (ie. either using the htt

O3 Security · Impact-Aware SCA

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