{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49953 exists.","fix":"No fix has been published for CVE-2026-49953 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-49953 is a medium-severity vulnerability in Discuz! X5.0, published on 15 Jun 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-2026-49953 and fix it if it is affected.\n\nWhat it is: CVE-2026-49953 is a medium-severity vulnerability in Discuz! X5.0, published on 15 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49953 exists.\n\nAffected product: Discuz! X5.0. 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-2026-49953/ (Markdown: https://insights.sbomify.com/CVE-2026-49953/index.md)","id":"CVE-2026-49953","markdown":"https://insights.sbomify.com/CVE-2026-49953/index.md","name":"CVE-2026-49953","record":{"aliases":["GHSA-p3qj-vw7q-v9pc"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Discuz! forum software","requires_auth":"none","summary":"Attackers can bypass CAPTCHA protections in Discuz! X5.0 using OCR models, enabling automated abuse of login and registration features.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-804","name":"Guessable CAPTCHA"}],"description":"Discuz! X5.0 releases 20260320 through 20260610 contains a CAPTCHA bypass vulnerability that allows unauthenticated remote attackers to defeat challenge controls by exploiting limited complexity and predictable character sets in generated CAPTCHA images. Attackers can train a custom optical character recognition model against collected CAPTCHA samples to reliably predict challenge text, bypassing protections on login, registration, and other functionality from automated abuse.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"Discuz! X5.0 CAPTCHA Bypass via Predictable Character Set","id":"CVE-2026-49953","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Discuz! X5.0 Local File Inclusion via enable_disable.php Plugin Directory","id":"CVE-2026-49954"},"packages":[],"prev":{"headline":"Discuz! X5.0 Authentication Bypass via dbbak.php Encryption Oracle","id":"CVE-2026-49952"},"products":["Discuz! X5.0"],"published":"2026-06-15","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)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-28","vendors":["Discuz!"]},"summary":"Attackers can bypass CAPTCHA protections in Discuz! X5.0 using OCR models, enabling automated abuse of login and registration features.","url":"https://insights.sbomify.com/CVE-2026-49953/"}