PatchTheCVECVE-2020-28501: This affects the package es6-crawler-detect before 3.1.3
CVE-2020-28501 is a medium-severity flaw (CVSS 5.3) affecting crawlerdetect. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
This affects the package es6-crawler-detect before 3.1.3. No limitation of user agent string length supplied to regex operators.
Why this priority
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.5% (top 26%) |
| CISA exploited list | No |
| Published | 2021-03-22 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-28501?
crawlerdetect: upgrade to 3.1.3. Exact commands for each OS are on this page.
Is CVE-2020-28501 being exploited?
CVE-2020-28501 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-28501 affect?
CVE-2020-28501 affects crawlerdetect. Severity is medium (CVSS 5.3). This affects the package es6-crawler-detect before 3.1.3. No limitation of user agent string length supplied to regex operators.
How urgent is CVE-2020-28501?
Priority 47/100. Public exploit reference; Remotely exploitable, no login, no user action