# CVE-2025-67857: moodle Info Disclosure — Fixed in 4.1.22 🐘 🐘 Packagist Not in CISA KEV MEDIUM severity # CVE-2025-67857 — moodle MEDIUM [Fix: moodle/moodle@ac30e7e](https://github.com/moodle/moodle/commit/ac30e7e19357f696979b7ffd760a7131b6ad88f6) CVE-2025-67857 is a medium-severity (CVSS 4.3) CWE-201 vulnerability in moodle/moodle. A fix is available for moodle/moodle — see the affected versions and patch details below. Moodle: moodle: data exposure of user identifiers in urls Also known asBIT-moodle-2025-67857[GHSA-8jrv-wx83-w3xj](/vulnerability/GHSA-8jrv-wx83-w3xj) Published Feb 3, 2026 Updated Oct 28, 2026 Affected 5 pkgs Patched 5 / 5 Exploits None indexed Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS) ## Exploitation Status ### No confirmed exploitation observed yet - CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment. Exploitation and automatability from CISA’s SSVC triage for CVE-2025-67857. ## EPSS Exploitation Probability [via FIRST.org ↗](https://www.first.org/epss/) 0.4%probability of exploitation in next 30 days Lower Risk0.00% Lower risk than most CVEs30th percentile — riskier than 30% of all scored CVEsHighest risk 0.00%0.29%0.57%0.86%0.0%0.4%May 26Sep 26Nov 26 Probability of exploitation in the next 30 days, from [FIRST.org EPSS](https://www.first.org/epss/). ## How urgent is this, really ## Where this sits among everything scored ## Real-World Exposure 5 pkgs affected 🐘`moodle/moodle`🐘`moodle/moodle`🐘`moodle/moodle`🐘`moodle/moodle`🐘`moodle/moodle` Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems. ## Description A flaw was found in moodle. During anonymous assignment submissions, user identifiers were inadvertently exposed in URLs. This data exposure allows unauthorized viewers to see internal user IDs, compromising the intended anonymity and potentially leading to information disclosure. ## Affected Packages 5 total 5 fixed Ecosystem Package Vulnerable range Fix 🐘Packagist `moodle/moodle` all versions 4.1.22`composer require moodle/moodle:^4.1.22` 🐘Packagist `moodle/moodle` ≥ 4.4.0-beta&&< 4.4.12 4.4.12`composer require moodle/moodle:^4.4.12` 🐘Packagist `moodle/moodle` ≥ 4.5.0-beta&&< 4.5.8 4.5.8`composer require moodle/moodle:^4.5.8` 🐘Packagist `moodle/moodle` ≥ 5.0.0-beta&&< 5.0.4 5.0.4`composer require moodle/moodle:^5.0.4` 🐘Packagist `moodle/moodle` ≥ 5.1.0-beta&&< 5.1.1 5.1.1`composer require moodle/moodle:^5.1.1` ## Affected Products 1 product · 5 configurations Application `moodle`moodle ≥ 5.0.0 && < 5.0.4 1 version 5.1.0 ## Detection & mitigation playbook Open-source dependency 1. ### Detect Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for moodle/moodle, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version. 2. ### Fix Update moodle/moodle to 4.1.22 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-67857 is resolved across your whole dependency graph. 3. ### Workarounds Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them. ## Frequently Asked Questions A flaw was found in moodle. During anonymous assignment submissions, user identifiers were inadvertently exposed in URLs. This data exposure allows unauthorized viewers to see internal user IDs, compromising the intended anonymity and potentially leading to information disclosure. O3 Security · Impact-Aware SCA ### Is CVE-2025-67857 in your dependencies? Find it across Packagist, including transitive dependencies. [Scan my dependencies](/book-demo) [How O3 SCA works](/impact-aware-sca)