# flarum/core (Packagist) vulnerabilities Source: https://junglewise.ai/threats/technologies/flarum-core Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 10 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/flarum-core.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 9 vulnerabilities in flarum/core (Packagist): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-41887, was published on 8 May 2026. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 0 - All time: 9 (0 critical, 0 exploited in the wild) ## About flarum/core (Packagist) Flarum is a forum software platform built with PHP providing modern discussion features. ## Latest flarum/core (Packagist) vulnerabilities - [CVE-2026-41887: Flarum LFI and SSRF via LESS theme settings injection](https://junglewise.ai/threats/cve-2026-41887-flarum-path-traversal-and-ssrf-in-less-parser-theme-settings) (medium, CVSS 4.9, published 8 May 2026) - [CVE-2025-27794: Flarum Vulnerable to Session Hijacking via Authoritative Subdomain Cookie Overwrite](https://junglewise.ai/threats/cve-2025-27794-flarum-vulnerable-to-session-hijacking-via-authoritative) (low, CVSS 3.1, published 12 Mar 2025) - [CVE-2024-21641: Flarum's logout Route allows open redirects](https://junglewise.ai/threats/cve-2024-21641-flarum-s-logout-route-allows-open-redirects) (low, CVSS 3.1, published 5 Jan 2024) - [CVE-2023-40033: Flarum vulnerable to LFI and Blind SSRF via Avatar upload](https://junglewise.ai/threats/cve-2023-40033-flarum-vulnerable-to-lfi-and-blind-ssrf-via-avatar-upload) (low, CVSS 3.1, published 16 Aug 2023) - [CVE-2023-27577: Path Traversal Vulnerability in `LESS` Parser allows reading of sensitive server files](https://junglewise.ai/threats/cve-2023-27577-path-traversal-vulnerability-in-less-parser-allows-reading-of) (low, CVSS 3.1, published 13 Mar 2023) - [CVE-2023-22489: Any Flarum user including unactivated can reply in public discussions whose first post was permanently deleted](https://junglewise.ai/threats/cve-2023-22489-any-flarum-user-including-unactivated-can-reply-in-public) (low, CVSS 3.1, published 10 Jan 2023) - [CVE-2023-22488: Flarum notifications can leak restricted content](https://junglewise.ai/threats/cve-2023-22488-flarum-notifications-can-leak-restricted-content) (low, CVSS 3.1, published 10 Jan 2023) - [CVE-2022-41938: Cross site scripting vulnerability with discussion titles](https://junglewise.ai/threats/cve-2022-41938-cross-site-scripting-vulnerability-with-discussion-titles) (low, CVSS 3.1, published 21 Nov 2022) - [CVE-2021-32671: XSS vulnerability with translator](https://junglewise.ai/threats/cve-2021-32671-xss-vulnerability-with-translator) (low, CVSS 3.1, published 7 Jun 2021) ## Most severe flarum/core (Packagist) vulnerabilities - [CVE-2026-41887: Flarum LFI and SSRF via LESS theme settings injection](https://junglewise.ai/threats/cve-2026-41887-flarum-path-traversal-and-ssrf-in-less-parser-theme-settings) (medium, CVSS 4.9, published 8 May 2026) - [CVE-2021-32671: XSS vulnerability with translator](https://junglewise.ai/threats/cve-2021-32671-xss-vulnerability-with-translator) (low, CVSS 3.1, published 7 Jun 2021) - [CVE-2024-21641: Flarum's logout Route allows open redirects](https://junglewise.ai/threats/cve-2024-21641-flarum-s-logout-route-allows-open-redirects) (low, CVSS 3.1, published 5 Jan 2024) - [CVE-2023-27577: Path Traversal Vulnerability in `LESS` Parser allows reading of sensitive server files](https://junglewise.ai/threats/cve-2023-27577-path-traversal-vulnerability-in-less-parser-allows-reading-of) (low, CVSS 3.1, published 13 Mar 2023) - [CVE-2022-41938: Cross site scripting vulnerability with discussion titles](https://junglewise.ai/threats/cve-2022-41938-cross-site-scripting-vulnerability-with-discussion-titles) (low, CVSS 3.1, published 21 Nov 2022) - [CVE-2023-22489: Any Flarum user including unactivated can reply in public discussions whose first post was permanently deleted](https://junglewise.ai/threats/cve-2023-22489-any-flarum-user-including-unactivated-can-reply-in-public) (low, CVSS 3.1, published 10 Jan 2023) - [CVE-2023-40033: Flarum vulnerable to LFI and Blind SSRF via Avatar upload](https://junglewise.ai/threats/cve-2023-40033-flarum-vulnerable-to-lfi-and-blind-ssrf-via-avatar-upload) (low, CVSS 3.1, published 16 Aug 2023) - [CVE-2025-27794: Flarum Vulnerable to Session Hijacking via Authoritative Subdomain Cookie Overwrite](https://junglewise.ai/threats/cve-2025-27794-flarum-vulnerable-to-session-hijacking-via-authoritative) (low, CVSS 3.1, published 12 Mar 2025) - [CVE-2023-22488: Flarum notifications can leak restricted content](https://junglewise.ai/threats/cve-2023-22488-flarum-notifications-can-leak-restricted-content) (low, CVSS 3.1, published 10 Jan 2023) ## Vulnerabilities per week Nothing was published in the last eight weeks. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other Packagist technologies - [moodle/moodle (Packagist)](https://junglewise.ai/threats/technologies/moodle-moodle): 434 vulnerabilities - [magento/community-edition (Packagist)](https://junglewise.ai/threats/technologies/packagist-magento-community-edition): 362 vulnerabilities - [typo3/cms (Packagist)](https://junglewise.ai/threats/technologies/packagist-typo3-cms): 187 vulnerabilities - [wwbn/avideo (Packagist)](https://junglewise.ai/threats/technologies/wwbn-avideo): 164 vulnerabilities - [magento/project-community-edition (Packagist)](https://junglewise.ai/threats/technologies/magento-project-community-edition): 161 vulnerabilities - [drupal/core (Packagist)](https://junglewise.ai/threats/technologies/packagist-drupal-core): 150 vulnerabilities - [pimcore/pimcore (Packagist)](https://junglewise.ai/threats/technologies/pimcore-pimcore): 145 vulnerabilities - [craftcms/cms (Packagist)](https://junglewise.ai/threats/technologies/craftcms-cms): 143 vulnerabilities - [dolibarr/dolibarr (Packagist)](https://junglewise.ai/threats/technologies/dolibarr-dolibarr): 127 vulnerabilities - [getgrav/grav (Packagist)](https://junglewise.ai/threats/technologies/getgrav-grav): 127 vulnerabilities - [typo3/cms-core (Packagist)](https://junglewise.ai/threats/technologies/typo3-cms-core): 127 vulnerabilities - [concrete5/concrete5 (Packagist)](https://junglewise.ai/threats/technologies/concrete5-concrete5): 122 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "flarum/core (Packagist) vulnerabilities", https://junglewise.ai/threats/technologies/flarum-core, 10 November 2026.