HOMEVULNERABILITIESCVE-2021-43857
HIGHPOC

CVE-2021-43857

CWE-78Published: December 27, 2021· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-43857 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

A proof-of-concept (PoC) exploit exists for CVE-2021-43857. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

gerapy1 product(s)
gerapy
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/Gerapy/Gerapy/commit/49bcb19be5e0320e7e1535f34fe00f16a3cf3b28
PATCHhttps://github.com/Gerapy/Gerapy/commit/49bcb19be5e0320e7e1535f34fe00f16a3cf3b28
ADVISORYhttp://packetstormsecurity.com/files/165459/Gerapy-0.9.7-Remote-Code-Execution.html
ADVISORYhttps://github.com/Gerapy/Gerapy/issues/219
ADVISORYhttps://github.com/Gerapy/Gerapy/security/advisories/GHSA-9w7f-m4j4-j3xw
ADVISORYhttp://packetstormsecurity.com/files/165459/Gerapy-0.9.7-Remote-Code-Execution.html
ADVISORYhttps://github.com/Gerapy/Gerapy/issues/219
ADVISORYhttps://github.com/Gerapy/Gerapy/security/advisories/GHSA-9w7f-m4j4-j3xw

All References (8)

→
http://packetstormsecurity.com/files/165459/Gerapy-0.9.7-Remote-Code-Execution.htmlExploit · Third Party Advisory
→
https://github.com/Gerapy/Gerapy/commit/49bcb19be5e0320e7e1535f34fe00f16a3cf3b28Patch · Third Party Advisory
→
https://github.com/Gerapy/Gerapy/issues/219Issue Tracking · Third Party Advisory
→
https://github.com/Gerapy/Gerapy/security/advisories/GHSA-9w7f-m4j4-j3xwThird Party Advisory
→
http://packetstormsecurity.com/files/165459/Gerapy-0.9.7-Remote-Code-Execution.htmlExploit · Third Party Advisory
→
https://github.com/Gerapy/Gerapy/commit/49bcb19be5e0320e7e1535f34fe00f16a3cf3b28Patch · Third Party Advisory
→
https://github.com/Gerapy/Gerapy/issues/219Issue Tracking · Third Party Advisory
→
https://github.com/Gerapy/Gerapy/security/advisories/GHSA-9w7f-m4j4-j3xwThird Party Advisory

Quick Facts

CVE IDCVE-2021-43857
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-78
CISA KEVNo
ExploitPOC
Affected1 vendor(s)
PublishedDec 27, 2021

Related CVEs (CWE-78)

CVE-2023-3572
10.0
CVE-1999-0067
10.0
CVE-2019-5485
10.0
CVE-2026-34234
KEV10.0
CVE-2024-24576
10.0
CVE-2025-5243
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-43857 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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