How severe is GHSA-f8rq-m28h-8hxj?

No CVSS score has been assigned to GHSA-f8rq-m28h-8hxj yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-f8rq-m28h-8hxj?

GHSA-f8rq-m28h-8hxj affects the following packages: htmr (npm). Ecosystems affected: npm.

How do I fix GHSA-f8rq-m28h-8hxj?

Update htmr to 0.8.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-f8rq-m28h-8hxj is resolved across your whole dependency graph.

How do I detect GHSA-f8rq-m28h-8hxj in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for htmr. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate GHSA-f8rq-m28h-8hxj if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against GHSA-f8rq-m28h-8hxj?

O3 pinpoints whether GHSA-f8rq-m28h-8hxj is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-f8rq-m28h-8hxj actively exploited in the wild?

No public exploit code has been indexed for GHSA-f8rq-m28h-8hxj 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.

When was GHSA-f8rq-m28h-8hxj published, and has it been updated?

GHSA-f8rq-m28h-8hxj was published on September 3, 2020 and was last updated on August 31, 2020. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

GHSA-f8rq-m28h-8hxj

GHSA-f8rq-m28h-8hxj is a security vulnerability in htmr. O3 Security confirms whether GHSA-f8rq-m28h-8hxj is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Cross-Site Scripting in htmr

Published

Sep 3, 2020

Updated

Aug 31, 2020

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Aug 31, 2020 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

57other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

htmrnpm

56Kdownloads / week

Description

Versions of htmr prior to 0.8.7 are vulnerable to Cross-Site Scripting (XSS). The package uses innerHTML to unescape HTML entities. This may lead to DOM-based XSS through HTML-encoded XSS payloads. This may allow an attacker to execute arbitrary JavaScript in a victim's browser.

Recommendation

Upgrade to version 0.8.7 or later.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`htmr`	all versions	0.8.7

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for htmr. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update htmr to 0.8.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-f8rq-m28h-8hxj is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-f8rq-m28h-8hxj is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-f8rq-m28h-8hxj. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Versions of `htmr` prior to 0.8.7 are vulnerable to Cross-Site Scripting (XSS). The package uses `innerHTML` to unescape HTML entities. This may lead to [DOM-based XSS](https://owasp.org/www-community/attacks/DOM_Based_XSS) through HTML-encoded XSS payloads. This may allow an attacker to execute arbitrary JavaScript in a victim's browser. ## Recommendation Upgrade to version 0.8.7 or later.

O3 Security · Impact-Aware SCA

Is GHSA-f8rq-m28h-8hxj in your dependencies?

O3 detects GHSA-f8rq-m28h-8hxj across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works