Public proof of conceptFix available

CVE-2021-43789

Q: Is CVE-2021-43789 actively exploited?

Active exploitation of CVE-2021-43789 has not been confirmed. Its EPSS score was 4.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-43789?

CVE-2021-43789 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2021-12-07
Fixed in1.7.8.2
WeaknessCWE-89

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

PrestaShop is an Open Source e-commerce web application. Versions of PrestaShop prior to 1.7.8.2 are vulnerable to blind SQL injection using search filters with `orderBy` and `sortOrder` parameters. The problem is fixed in version 1.7.8.2.

Timeline

dates in UTC

2021-12-0717:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 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-2021-43789?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-43789?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

PrestaShop

Branch	Affected	Fixed in	Source
1.7	≥ 1.7.5.0, < 1.7.8.2	1.7.8.2	NVD · OSV

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

Fix

Update PrestaShop to 1.7.8.2

Advisories and patches

github.comRelease Notes

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiednumanturle/CVE-2021-43789

Sources

CNACVSS 3.17.5read 2026-10-23
NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
CNAweakness (CWE)CWE-89read 2026-10-23
FIRST EPSSEPSS score4.7 %2026-10-22
PoC-in-GitHubproof of concept1read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2021-12-07
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-43789?

Is CVE-2021-43789 actively exploited?

Active exploitation of CVE-2021-43789 has not been confirmed. Its EPSS score was 4.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-43789?

CVE-2021-43789 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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