800,000 WordPress Sites Affected by Arbitrary File Upload Vulnerability in WPvivid Backup WordPress Plugin

On January 12th, 2026, we received a submission for an Arbitrary File Upload vulnerability in WPvivid Backup, a WordPress plugin with more than 800,000 active installations. This vulnerability can be used by unauthenticated attackers to upload arbitrary files to a vulnerable site and achieve remo...

Wordfence Intelligence Weekly WordPress Vulnerability Report (January 26, 2026 to February 1, 2026)

Did you know Wordfence runs aBug Bounty Program for all WordPress plugin and themes at no cost to vendors? Researchers can earn up to $31,200 per vulnerability , for all in-scope vulnerabilities submitted to our Bug Bounty Program! Find a vulnerability, submit the details directly to us, and we...

Wordfence Intelligence Weekly WordPress Vulnerability Report (January 19, 2026 to January 25, 2026)

Did you know Wordfence runs aBug Bounty Program for all WordPress plugin and themes at no cost to vendors? Researchers can earn up to $31,200 per vulnerability , for all in-scope vulnerabilities submitted to our Bug Bounty Program! Find a vulnerability, submit the details directly to us, and we...

Cross-dashboard privilege escalation via permission management

Grafana is an open-source platform for monitoring and observability. The platform supports creating dashboards, which collate various visualisation panels onto one plane. These can have per-user permissions. If a user has permission management rights on one dashboard, they could edit the...

Tucows (VDP): Password Strength Policy Bypass via Server-Side Validation Flaw

A password strength policy bypass was discovered due to a server-side validation flaw. The password strength policy was only enforced in the browser, not on the server side...

Wordfence Bug Bounty Program Monthly Report – December 2025

Last month in December 2025, the Wordfence Bug Bounty Program received 759 vulnerability submissions from our growing community of security researchers working to improve the overall security posture of the WordPress ecosystem. These submissions are reviewed, triaged, and processed by the Wordfen...

Nextcloud: View-only guests could see deleted Collectives pages in the trashbin

A vulnerability was discovered where view-only guests could see deleted Collectives pages in the trashbin...

Wordfence Intelligence Weekly WordPress Vulnerability Report (January 12, 2026 to January 18, 2026)

Did you know Wordfence runs aBug Bounty Program for all WordPress plugin and themes at no cost to vendors? Researchers can earn up to $31,200 per vulnerability , for all in-scope vulnerabilities submitted to our Bug Bounty Program! Find a vulnerability, submit the details directly to us, and we...

100,000 WordPress Sites Affected by Privilege Escalation Vulnerability in Advanced Custom Fields: Extended WordPress Plugin

On December 10th, 2025, we received a submission for a Privilege Escalation vulnerability in Advanced Custom Fields: Extended, a WordPress plugin with more than 100,000+ active installations. This vulnerability makes it possible for an unauthenticated attacker to grant themselves administrative...

Nextcloud: Private circle can be added to another circle via API despite visibility restriction

A vulnerability was discovered where private circles could be added to other circles via the API, despite visibility restrictions...

Node.js: HashDoS in V8

Vulnerability description not provided...

Wordfence Intelligence Weekly WordPress Vulnerability Report (January 5, 2026 to January 11, 2026)

Did you know Wordfence runs aBug Bounty Program for all WordPress plugin and themes at no cost to vendors? Researchers can earn up to $31,200 per vulnerability , for all in-scope vulnerabilities submitted to our Bug Bounty Program! Find a vulnerability, submit the details directly to us, and we...

Uncontrolled Recursion in NLTK StupidBackoff Language Model Allows Denial of Service

Description NLTK’s StupidBackoff language model contains an unbounded recursive call in its scoring logic. The recursion depth is directly proportional to the length of the supplied context and is not limited or validated by the library. This behavior is triggered through normal, documented API...

go-ethereum is vulnerable to high CPU usage leading to DoS via malicious p2p message

Impact An attacker can cause high CPU usage by sending a specially crafted p2p message. More details to be released later. Credit This issue was reported to the Ethereum Foundation Bug Bounty Program by @Yenya030...

GHSA-MR7Q-C9W9-WH4H go-ethereum is vulnerable to DoS via malicious p2p message affecting a vulnerable node

Impact A vulnerable node can be forced to shutdown/crash using a specially crafted message. More details to be released later. Credit This issue was reported to the Ethereum Foundation Bug Bounty Program by DELENE TCHIO ROMUALD...

go-ethereum is vulnerable to DoS via malicious p2p message affecting a vulnerable node

Impact A vulnerable node can be forced to shutdown/crash using a specially crafted message. More details to be released later. Credit This issue was reported to the Ethereum Foundation Bug Bounty Program by DELENE TCHIO ROMUALD...

HikariSystem-Tsurugi

⚔️ TSURUGI v3.0 Offensive Web Security Framework...

Arbitrary File Read via Log Symlink following in FileTaskHandler

This report is not public...

CVE-2021-41599

A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This...

CVE-2021-22865

An improper access control vulnerability was identified in GitHub Enterprise Server that allowed access tokens generated from a GitHub App's web authentication flow to read private repository metadata via the REST API without having been granted the appropriate permissions. To exploit this...