EUVD-2026-39698
GHSA-mm42-2mqm-6mqx
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Unauthenticated network-reachable plugin endpoint with low complexity (AV:N/AC:L/PR:N/UI:N); information disclosure drives C:H while integrity/availability impacts are limited (I:L/A:L), matching the disclosed signals.
Primary rating from Vendor (patchstack).
CVSS VectorVendor: patchstack
Lifecycle Timeline
1DescriptionCVE.org
Unauthenticated Multiple Vulnerabilities in BitFire Security <= 5.0.3 versions.
AnalysisAI
Information disclosure and related weaknesses in the BitFire Security WordPress firewall plugin (versions 5.0.3 and earlier) let remote unauthenticated attackers extract sensitive data and tamper with limited integrity, per a Patchstack-reported advisory. The CVSS 3.1 base score of 8.6 reflects network-reachable, no-privilege exploitation (AV:N/AC:L/PR:N/UI:N) with high confidentiality impact, ironic for a product whose purpose is to harden WordPress sites. No public exploit code has been identified at time of analysis, and the issue is not on the CISA KEV list; EPSS data was not provided.
Technical ContextAI
BitFire is a WordPress security/firewall (WAF) plugin that runs inside the PHP/WordPress request lifecycle to filter and block malicious traffic. The advisory bundles 'multiple vulnerabilities' under CWE-1284 (Improper Validation of Specified Quantity in Input), meaning the plugin fails to verify that a supplied quantity, count, or length value falls within expected bounds before using it - a class of bug that can lead to reading or returning more data than intended, out-of-range access, or logic bypass. Because the affected component is a security plugin operating on untrusted HTTP input, flawed quantity validation in its request-handling endpoints is the plausible root cause; the 'Information Disclosure' tag indicates the primary observable impact is leakage of sensitive data rather than full code execution. No CPE strings were supplied; the affected platform is any WordPress installation running the BitFire plugin.
RemediationAI
No vendor-released patched version is identified in the available data, so the recommended action is to consult the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/bitfire/vulnerability/wordpress-bitfire-security-plugin-5-0-3-multiple-vulnerabilities-vulnerability) and the plugin's WordPress.org changelog for any release newer than 5.0.3 and upgrade to it immediately once confirmed. As compensating controls until a verified fix is installed, restrict access to the plugin's HTTP endpoints at the perimeter (deploy an upstream WAF rule or web-server access control limiting the BitFire request paths to known administrator IPs), since the attack is unauthenticated and network-based - the trade-off is potential disruption to the plugin's own legitimate traffic-handling. If the plugin cannot be patched and the leaked data is sensitive, consider temporarily deactivating the BitFire plugin and substituting an alternative WAF, accepting the trade-off of losing BitFire's protections during the gap. Avoid exposing the WordPress admin and plugin endpoints directly to the internet where feasible.
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Same technique Information Disclosure
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External POC / Exploit Code
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