How severe is CVE-2021-28380?

CVE-2021-28380 has a CVSS score of 5.4/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2021-28380?

CVE-2021-28380 affects the following packages: aimeos/aimeos-typo3 (Packagist), aimeos/aimeos-typo3 (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2021-28380?

Update aimeos/aimeos-typo3 to 19.10.12 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-28380 is resolved across your whole dependency graph.

How do I detect CVE-2021-28380 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for aimeos/aimeos-typo3, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2021-28380 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2021-28380 actively exploited in the wild?

No public exploit code has been indexed for CVE-2021-28380 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2021-28380?

CVE-2021-28380 has an EPSS (Exploit Prediction Scoring System) score of 0.6%, placing it in the 46th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2021-28380?

CVE-2021-28380 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2021-28380 published, and has it been updated?

CVE-2021-28380 was published on May 24, 2022 and was last updated on February 16, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘

🐘 Packagist

Not in CISA KEV

MEDIUM severity

CVE-2021-28380 — aimeos-typo3

MEDIUM

CVE-2021-28380 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in aimeos/aimeos-typo3. A fix is available for aimeos/aimeos-typo3 — see the affected versions and patch details below.

Aimeos Typo3 extension contains Cross-site Scripting vulnerability

Published

May 24, 2022

Updated

Feb 16, 2024

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Oct 30, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.6%probability of exploitation in next 30 days

Lower Risk+0.05%

Lower risk than most CVEs46th percentile — riskier than 46% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected

🐘aimeos/aimeos-typo3🐘aimeos/aimeos-typo3

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

The aimeos (aka Aimeos shop and e-commerce framework) extension before 19.10.12 and 20.x before 20.10.5 for TYPO3 allows Cross-site Scripting (XSS) via a backend user account.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`aimeos/aimeos-typo3`	all versions	19.10.12`composer require aimeos/aimeos-typo3:^19.10.12`
🐘Packagist	`aimeos/aimeos-typo3`	≥ 20.0.0&&< 20.10.5	20.10.5`composer require aimeos/aimeos-typo3:^20.10.5`

Affected Products

1 product · 2 configurations

Application

aimeosaimeos_project

≥ 20.0.0 && < 20.10.5

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for aimeos/aimeos-typo3, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update aimeos/aimeos-typo3 to 19.10.12 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-28380 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

The aimeos (aka Aimeos shop and e-commerce framework) extension before 19.10.12 and 20.x before 20.10.5 for TYPO3 allows Cross-site Scripting (XSS) via a backend user account.

O3 Security · Impact-Aware SCA

Is CVE-2021-28380 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

5.4/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CWE Classification

CWE-79Cross-site Scripting (XSS)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

May 24, 2022

Last updated

Feb 16, 2024

Identifiers

CVE-2021-28380

References

Advisorynvd.nist.gov · CVE 2021 28380 Webtypo3.org · typo3 ext sa 2021 003

Related vulnerabilities

This CVE is medium severity; 8 of 8 other CVEs with CWE-79 are rated as high or higher (top: critical).

CVE-2026-55649CVE-2026-113787CVE-2026-44267CVE-2026-96632CVE-2026-9086CVE-2026-118246CVE-2026-118251CVE-2026-118253Browse all CWE-79

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedFeb 16, 2024