CVE-2026-64638 Affecting wordpress package, versions <7.0.3+dfsg1-1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published7 Aug 2026
- disclosed7 Aug 2026
Introduced: 7 Aug 2026
NewCVE-2026-64638 (opens in a new tab)How to fix?
Upgrade Debian:unstable wordpress to version 7.0.3+dfsg1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream wordpress package and not the wordpress package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
WordPress is vulnerable to a pre-auth reflected XSS vulnerability on the login screen.
Via a specially crafted malicious third-party website hosted by an attacker, it is possible for this to be escalated to an RCE vulnerability with conditions outside of the attackers control. This requires successful social engineering of and explicit interaction by the target victim.
This issue affects all versions of WordPress. Version 7.0.3 has been released, containing a fix for the vulnerability, and as a courtesy to users on older branches the fix has been backported to all branches back to 4.7.
Discovered and responsibly disclosed by the team at pwn.ai.
References
- https://security-tracker.debian.org/tracker/CVE-2026-64638
- https://hackerone.com/reports/3877102
- https://wordpress.org/news/2026/08/wordpress-7-0-3-release/
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-64638.yaml
- https://github.com/Boreas37/CVE-2026-64638-PoC