{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-76581 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-76581 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-76581 is a critical authentication bypass vulnerability in wpmudev WPMU DEV Dashboard, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-76581 and fix it if it is affected.\n\nWhat it is: CVE-2026-76581 is a critical authentication bypass vulnerability in wpmudev WPMU DEV Dashboard, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-76581 in the wild and no public exploit code.\n\nAffected product: wpmudev WPMU DEV Dashboard. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-76581/ (Markdown: https://insights.sbomify.com/CVE-2026-76581/index.md)","id":"CVE-2026-76581","markdown":"https://insights.sbomify.com/CVE-2026-76581/index.md","name":"CVE-2026-76581","record":{"aliases":["GHSA-2cxw-5886-mfv5"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["privilege_escalation","account_takeover"],"network_reachable":"yes","non_default_config":true,"product_category":"WordPress plugin","requires_auth":"none","summary":"Unauthenticated attackers can bypass authentication to gain administrator access via HMAC confusion in WPMU DEV Dashboard when Hub SSO is enabled.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Wordfence","cpe":[],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"description":"The WPMU DEV Dashboard plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 5.0.1. This is due to inconsistent and ambiguous HMAC message construction between the unauthenticated `wdpsso_step1` and `wdpsso_step2` AJAX actions, where step 1 signs and discloses an unseparated concatenation of the token, state, redirect, and domain values, while step 2 verifies an unseparated concatenation that omits the domain field. This makes it possible for unauthenticated attackers, on sites connected to WPMU DEV with Hub SSO enabled and mapped to an administrator, to obtain a valid HMAC from step 1 and replay it to step 2 by moving the domain value into the redirect field, resulting in an authenticated administrator session.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-08-30","github_poc":2,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-08-30T12:52:47Z","kind":"github_poc","ref":"https://github.com/HORKimhab/CVE-2026-76581","stars":0,"title":"CVE-2026-76581"},{"date":"2026-08-30T17:32:26Z","kind":"github_poc","ref":"https://github.com/hackersroot/CVE-2026-76581-Detector","stars":0,"title":"Safe passive detector for identifying WPMU DEV Dashboard versions affected by CVE-2026-76581."}],"tier":"poc_unverified"},"has_fix":null,"headline":"WPMU DEV Dashboard \u003c= 5.0.1 - Authentication Bypass to Administrator via SSO HMAC Canonicalization Confusion","id":"CVE-2026-76581","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"TRENDnet TEW-821DAP ssi ping.cgi system command injection","id":"CVE-2026-76582"},"packages":[],"prev":{"headline":"LiteSpeed Cache \u003c= 7.9 - Reflected Cross-Site Scripting via ESI 'esi' Parameter","id":"CVE-2026-76579"},"products":["WPMU DEV Dashboard"],"published":"2026-08-28","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-28","vendors":["wpmudev"]},"summary":"Unauthenticated attackers can bypass authentication to gain administrator access via HMAC confusion in WPMU DEV Dashboard when Hub SSO is enabled.","url":"https://insights.sbomify.com/CVE-2026-76581/"}