# CVE-2021-25977: Cross-site Scripting in PiranhaCMS

Source: https://junglewise.ai/threats/cve-2021-25977-cross-site-scripting-in-piranhacms  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-10-27  
License: CC BY 4.0 with a link back

CVE-2021-25977 · Severity: low · CVSS 3.1 · Published 2021-10-27

Cross-site Scripting in PiranhaCMS

Technologies: [Piranha (NuGet)](https://junglewise.ai/threats/technologies/piranha). Vendors: [NuGet](https://junglewise.ai/threats/vendors/nuget).

## Quick answers

**Is CVE-2021-25977 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-25977 being exploited in the wild.

**How severe is CVE-2021-25977?** Low severity, with a CVSS score of 3.1, published 27 October 2021.

**Which products and versions are affected?** Piranha (NuGet) ECOSYSTEM:introduced=7.0.0,fixed=9.2.0.

**Is there a fix for CVE-2021-25977?** Yes. Piranha (NuGet): upgrade to 9.2.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-25977?** Check whether you run Piranha (NuGet) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Piranha (NuGet): upgrade to 9.2.0 or later

  ```sh
  dotnet add package Piranha --version 9.2.0
  ```


## Affected products

- Piranha (NuGet) ECOSYSTEM:introduced=7.0.0,fixed=9.2.0

## Identifiers

- CVE-2021-25977
- GHSA-jvjp-vh27-r9h5

## Related threats

- [Piranha CMS stored XSS in Media module folder name](https://junglewise.ai/threats/cve-2025-67291-piranha-cms-stored-xss-in-media-module-folder-name)
- [Piranha CMS stored XSS in Page Settings Excerpt field](https://junglewise.ai/threats/cve-2025-67290-piranha-cms-stored-xss-in-page-settings-excerpt-field)
- [Piranha CMS vulnerable to stored cross-site scripting (XSS)](https://junglewise.ai/threats/cve-2025-61413-piranha-cms-vulnerable-to-stored-cross-site-scripting-xss)
- [PiranhaCMS stored XSS](https://junglewise.ai/threats/cve-2025-57692-piranhacms-stored-xss)
- [Piranha CMS Cross-site Scripting vulnerability](https://junglewise.ai/threats/cve-2024-55341-piranha-cms-cross-site-scripting-vulnerability)