{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-13253 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-13253 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-13253 is a medium-severity cross-site scripting vulnerability in wpxpo Post Grid Gutenberg Blocks – PostX, published on 9 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-13253 and fix it if it is affected.\n\nWhat it is: CVE-2026-13253 is a medium-severity cross-site scripting vulnerability in wpxpo Post Grid Gutenberg Blocks – PostX, published on 9 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-13253 in the wild and no public exploit code.\n\nAffected product: wpxpo Post Grid Gutenberg Blocks – PostX. 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-2026-13253/ (Markdown: https://insights.sbomify.com/CVE-2026-13253/index.md)","id":"CVE-2026-13253","markdown":"https://insights.sbomify.com/CVE-2026-13253/index.md","name":"CVE-2026-13253","record":{"aliases":["GHSA-fmqh-3qcq-wcxg"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"WordPress plugin","requires_auth":"low_privilege","summary":"Authenticated contributors can inject arbitrary scripts via the moreResultsText attribute, leading to stored XSS execution on victim pages.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Wordfence","cpe":[],"cvss":{"score":6.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"The Ultimate Post plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'moreResultsText' block attribute of the ultimate-post/advanced-search block in versions up to and including 5.0.31. This is due to insufficient input sanitization and output escaping in the Advanced_Search::content() render callback: the attribute value is filtered with wp_kses(), which strips disallowed HTML tags but does NOT escape HTML special characters such as double quotes in plain text, and the result is then concatenated directly into the data-viewmoretext HTML attribute without esc_attr(). This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Cross-site scripting in Post Grid Gutenberg Blocks – PostX","id":"CVE-2026-13253","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"IBM DataPower Gateway Insufficient Verification of Data Authenticity","id":"CVE-2026-13257"},"packages":[],"prev":{"headline":"Cross-site scripting in RSS Aggregator by Feedzy – Feed to Post, Autoblogging, News \u0026 YouTube Video Feeds Aggregator","id":"CVE-2026-13252"},"products":["Post Grid Gutenberg Blocks – PostX"],"published":"2026-07-09","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-09","vendors":["wpxpo"]},"summary":"Authenticated contributors can inject arbitrary scripts via the moreResultsText attribute, leading to stored XSS execution on victim pages.","url":"https://insights.sbomify.com/CVE-2026-13253/"}