CVE-2020-7616
CVE-2020-7616 is a medium-severity vulnerability in Express-mock-middleware Project Express-mock-middleware with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1321.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (66th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-1321
- Affected product: Express-mock-middleware Project Express-mock-middleware
- Published:
- Last modified:
Description
express-mock-middleware through 0.0.6 is vulnerable to Prototype Pollution. Exported functions by the package can be tricked into adding or modifying properties of the `Object.prototype`. Exploitation of this vulnerability requires creation of a new directory where an attack code can be placed which will then be exported by `express-mock-middleware`. As such, this is considered to be a low risk.
Frequently asked questions
- What is CVE-2020-7616?
- express-mock-middleware through 0.0.6 is vulnerable to Prototype Pollution. Exported functions by the package can be tricked into adding or modifying properties of the `Object.prototype`. Exploitation of this vulnerability requires creation of a new directory where an attack code can be placed which will then be exported by `express-mock-middleware`. As such, this is considered to be a low risk.
- How severe is CVE-2020-7616?
- CVE-2020-7616 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
- Is CVE-2020-7616 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-7616?
- CVE-2020-7616 affects Express-mock-middleware Project Express-mock-middleware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-7616?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-7616 published?
- CVE-2020-7616 was published on 2020-04-07 and last updated on 2026-06-17.
References
- https://github.com/LingyuCoder/express-mock-middleware/blob/master/lib/index.js#L39
- https://snyk.io/vuln/SNYK-JS-EXPRESSMOCKMIDDLEWARE-564120
Affected products (1)
- cpe:2.3:a:express-mock-middleware_project:express-mock-middleware:*:*:*:*:*:*:*:*
Other CWE-1321 (Prototype Pollution) vulnerabilities
- CVE-2026-25142 — Critical (CVSS 10.0): SandboxJS is a JavaScript sandboxing library. Prior to 0.8.27, SanboxJS does not properly restrict __lookupGetter__…
- CVE-2024-39008 — Critical (CVSS 10.0): robinweser fast-loops v1.1.3 was discovered to contain a prototype pollution via the function objectMergeDeep. This…
- CVE-2024-38999 — Critical (CVSS 10.0): jrburke requirejs v2.3.6 was discovered to contain a prototype pollution via the function s.contexts._.configure. This…
- CVE-2022-29823 — Critical (CVSS 10.0): Feather-Sequalize cleanQuery method uses insecure recursive logic to filter unsupported keys from the query object.…
- CVE-2022-24760 — Critical (CVSS 10.0): Parse Server is an open source http web server backend. In versions prior to 4.10.7 there is a Remote Code Execution…
- CVE-2020-12079 — Critical (CVSS 10.0): Beaker before 0.8.9 allows a sandbox escape, enabling system access and code execution. This occurs because Electron…