Skip to main content
Public proof of conceptFix available

CVE-2021-43857

A public proof of concept exists; no exploitation attested.

  • Published2021-12-27
  • Fixed in0.9.8
  • WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Gerapy is a distributed crawler management framework. Gerapy prior to version 0.9.8 is vulnerable to remote code execution, and this issue is patched in version 0.9.8.

Timeline

dates in UTC
  1. 2021-12-2719:15CVE publishedNVD
  2. 2022-01-05Exploit-DB entryExploit-DB

Observed activity

isMalicious corpus · updated 2026-11-03 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-43857?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-43857?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Gerapy
BranchAffectedFixed in
0.9< 0.9.80.9.8

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Gerapy to 0.9.8

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-50640
Exploit-DB
Proof-of-concept repositories
5 repositories, unverifiedLongWayHomie/CVE-2021-43857lowkey0808/CVE-2021-43857G4sp4rCS/CVE-2021-43857-POCProwlSec/gerapy-cve-2021-43857afifudinmtop/CVE-2021-43857-Gerapy-v0.9.7
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.19.8known since 2026-10-23
  • NVDCVSS 3.18.8read 2026-10-23
  • NVDCVSS 2.06.5read 2026-10-23
  • CNAweakness (CWE)CWE-78known since 2026-10-23
  • FIRST EPSSEPSS score55.6 %read 2026-11-02
  • PoC-in-GitHubproof of concept5read 2026-11-02
  • Exploit-DBdetectionread 2026-11-02
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryCRITICAL2022-01-05

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2021-12-27
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-9w7f-m4j4-j3xw

Frequently asked questions

What is CVE-2021-43857?

Gerapy is a distributed crawler management framework. Gerapy prior to version 0.9.8 is vulnerable to remote code execution, and this issue is patched in version 0.9.8.

Is CVE-2021-43857 actively exploited?

Active exploitation of CVE-2021-43857 has not been confirmed. Its EPSS score was 55.6% on 2026-11-02, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-43857?

CVE-2021-43857 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Running gerapy? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, October 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record