CVE-2025-4803 Glossary by WPPedia <= 1.3.0 - Authenticated (Administrator+) PHP Object Injection
Authenticated administrators can exploit PHP object injection in the Glossary by WPPedia plugin, potentially leading to code execution or data exposure if a POP chain exists.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-4803?
CVE-2025-4803 is a high-severity unsafe deserialization vulnerability in steinrein Glossary by WPPedia – Best Glossary plugin for WordPress, published on 21 May 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Glossary by WPPedia – Best Glossary plugin for WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.3.0 via deserialization of untrusted input from the 'posttypes' parameter. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
Weakness: CWE-502
Which versions are affected by CVE-2025-4803?
How do I fix CVE-2025-4803?
No fix has been published for CVE-2025-4803 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-4803 being exploited?
There is no known exploitation of CVE-2025-4803 in the wild and no public exploit code.
Sources
Also known as GHSA-xm6v-3wmv-c56v.