How severe is GHSA-79hv-pfx6-hhpj?

No CVSS score has been assigned to GHSA-79hv-pfx6-hhpj yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-79hv-pfx6-hhpj?

GHSA-79hv-pfx6-hhpj affects the following packages: impresscms/impresscms (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-79hv-pfx6-hhpj?

No patched version of impresscms/impresscms has shipped for GHSA-79hv-pfx6-hhpj yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

How do I detect GHSA-79hv-pfx6-hhpj in my Packagist dependencies?

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

How do I mitigate GHSA-79hv-pfx6-hhpj 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 GHSA-79hv-pfx6-hhpj actively exploited in the wild?

Yes. There are 1 known exploit references for GHSA-79hv-pfx6-hhpj, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for GHSA-79hv-pfx6-hhpj?

GHSA-79hv-pfx6-hhpj has an EPSS (Exploit Prediction Scoring System) score of 0.9%, placing it in the 58th 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 GHSA-79hv-pfx6-hhpj?

GHSA-79hv-pfx6-hhpj 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 GHSA-79hv-pfx6-hhpj published, and has it been updated?

GHSA-79hv-pfx6-hhpj was published on March 12, 2021 and was last updated on November 8, 2023. 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

Cross-site scripting (XSS)GHSA-79hv-pfx6-hhpj

GHSA-79hv-pfx6-hhpj is a Cross-site Scripting (XSS) vulnerability in impresscms/impresscms. 1 public exploit reference exists, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.

Also known asCVE-2021-28088

Published

Mar 12, 2021

Updated

Nov 8, 2023

Affected

1 pkg

Patched

See advisory

Exploits

1 known

Exploitation data as of Oct 12, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.9%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs58th percentile — riskier than 58% of all scored CVEsHighest risk

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

Real-World Exposure

1 pkg affected

🐘impresscms/impresscms

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

Cross-site scripting (XSS) in modules/content/admin/content.php in ImpressCMS profile 1.4.2 allows remote attackers to inject arbitrary web script or HTML parameters through the "Display Name" field.

Affected Packages

1 total

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`impresscms/impresscms`	all versions	No fix

Affected Products

1 product · 1 configurations

Application

impresscmsimpresscms

1 version

1.4.2

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Cross-site scripting (XSS) in modules/content/admin/content.php in Impre…

anotepad.comNVDMar 2021

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for impresscms/impresscms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
No patched version of impresscms/impresscms has shipped for GHSA-79hv-pfx6-hhpj yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
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

Cross-site scripting (XSS) in modules/content/admin/content.php in ImpressCMS profile 1.4.2 allows remote attackers to inject arbitrary web script or HTML parameters through the "Display Name" field.

O3 Security · Impact-Aware SCA

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