Summary
XML-RPC for PHP's debugger vulnerable to possible XSS attack
The bundled xml-rpc debugger is susceptible to XSS attacks.
Since the debugger is not designed to be exposed to end users but only to the developers using this library, and in the default configuration it is not exposed to requests from the web, the likelihood of exploitation may be low.
Impact
Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Already deployed Kodem?
See it in your environmentNew to Kodem? Get a demo →Remediation advice
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is GHSA-PXQJ-XRV5-QVJF? GHSA-PXQJ-XRV5-QVJF is a medium-severity cross-site scripting (XSS) vulnerability in phpxmlrpc/phpxmlrpc (composer), affecting versions < 4.9.2. It is fixed in 4.9.2. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
- Which versions of phpxmlrpc/phpxmlrpc are affected by GHSA-PXQJ-XRV5-QVJF? phpxmlrpc/phpxmlrpc (composer) versions < 4.9.2 is affected.
- Is there a fix for GHSA-PXQJ-XRV5-QVJF? Yes. GHSA-PXQJ-XRV5-QVJF is fixed in 4.9.2. Upgrade to this version or later.
- Is GHSA-PXQJ-XRV5-QVJF exploitable, and should I be worried? Whether GHSA-PXQJ-XRV5-QVJF is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-PXQJ-XRV5-QVJF is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-PXQJ-XRV5-QVJF? Upgrade
phpxmlrpc/phpxmlrpcto 4.9.2 or later.