Three distinct URL allowlist bypasses in Symfony's symfony/html-sanitizer component allow content authors to smuggle off-allowlist URLs past host and scheme restriction controls configured via allowLinkHosts(), allowLinkSchemes(), allowMediaHosts(), and allowMediaSchemes(). The root cause is a combination of parser-differential attacks exploiting divergence between RFC-3986 (used server-side) and the WHATWG URL Standard (used by browsers), plus misclassification of <area> elements as media rather than navigable links. Affected applications processing untrusted HTML with host/scheme allowlists in symfony/html-sanitizer 6.1.0-6.4.39, 7.0.0-7.4.11, and 8.0.0-8.0.11 are at risk; no public exploit identified at time of analysis and this CVE does not appear in CISA KEV.
Protocol-relative URL injection in Symfony's UrlGenerator allows open redirect via regex alternation bypass in route parameter validation. When route requirements use alternation patterns (e.g., `_locale: 'en|fr|vi|de'`), the validation regex `#^REQUIREMENT$#` fails to anchor middle alternatives due to regex operator precedence, enabling substring matching against attacker-supplied values. An attacker who can influence route parameters fed into the Twig `path()`/`url()` helpers can inject a value like `/evil.com` - which satisfies the requirement by containing `vi` as a substring - causing UrlGenerator to produce `//evil.com/...`, a protocol-relative URL the browser navigates off-site. No public exploit is identified at time of analysis, and the vulnerability is not listed in CISA KEV; patches are released across all supported Symfony branches.
Stored XSS in Symfony's WebProfiler `CodeExtension::fileExcerpt()` allows JavaScript execution in a developer's browser when the profiler renders non-PHP files containing attacker-controlled content. Affected are symfony/symfony 6.4.24-6.4.39, 7.2.9-7.4.11, and 8.0.0-8.0.11, along with symfony/twig-bridge 6.4.24-6.4.39. The attack requires a separate write primitive to any file under the project root - log poisoning via `var/log/dev.log` is the canonical vector - after which exploitation is reliable and requires only developer interaction with the profiler. No public exploit has been identified at time of analysis, and the vulnerability is scoped to development environments only.
Weak password recovery in QianFox FoxCMS versions 1.2.0 through 1.2.6 exposes the admin panel's account recovery flow to abuse by authenticated administrators via a remotely accessible network vector. Publicly available exploit code exists (CVSS E:P), though the requirement for high privileges (PR:H) substantially constrains real-world impact, corroborated by an EPSS score of just 0.03% (11th percentile) and no CISA KEV listing. The vendor was notified via a GitHub issue report but has not responded, leaving all affected versions unpatched at time of analysis.
Cross-site scripting in QianFox FoxCMS versions 1.2.0 through 1.2.6 allows a high-privileged attacker to inject malicious JavaScript via the /Tag/edit endpoint in the Administrator Backend, executing in the context of another user's browser session upon interaction. A proof-of-concept exploit has been publicly disclosed via a GitHub issue report, though the vendor has not yet acknowledged or responded to the disclosure. The CVSS 4.0 score of 1.9 and EPSS of 0.03% (9th percentile) reflect the severe prerequisite constraints - administrator-level authentication and passive user interaction - which sharply limit real-world exploitability.