# CVE-2025-12880: Progress Bar Blocks for Gutenberg <= 1.0.0 - Authenticated (Author+) Stored Cross-Site Scripting via SVG

> Authenticated attackers with Author access can inject arbitrary scripts via SVG uploads, leading to stored XSS execution for other users.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 11 Nov 2025
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-79wj-q85x-crhp

## What is CVE-2025-12880?

CVE-2025-12880 is a medium-severity cross-site scripting vulnerability in jobayer534 Progress Bar Blocks for Gutenberg, published on 11 Nov 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The Progress Bar Blocks for Gutenberg plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG File uploads in all versions up to, and including, 1.0.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the SVG file.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2025-12880?


## How do I fix CVE-2025-12880?

No fix has been published for CVE-2025-12880 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-12880 being exploited?

There is no known exploitation of CVE-2025-12880 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-12880 and fix it if it is affected.

What it is: CVE-2025-12880 is a medium-severity cross-site scripting vulnerability in jobayer534 Progress Bar Blocks for Gutenberg, published on 11 Nov 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-12880 in the wild and no public exploit code.

Affected product: jobayer534 Progress Bar Blocks for Gutenberg. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-12880/ (Markdown: https://insights.sbomify.com/CVE-2025-12880/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-12880
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-12880
- OSV: https://osv.dev/vulnerability/CVE-2025-12880

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-12880/
Summaries are generated and may contain mistakes; the official description above is the record.