# CVE-2026-77830: Cross-site scripting in Spam protection, Honeypot, Anti-Spam by CleanTalk

> Authenticated attackers can inject scripts via comment placeholders, executing code for non-logged-in visitors in the CleanTalk WordPress plugin.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Sep 2026
- **Updated:** 8 Sep 2026
- **Also known as:** GHSA-63v3-hvpj-cxrm

## What is CVE-2026-77830?

CVE-2026-77830 is a high-severity cross-site scripting vulnerability in Spam protection, Honeypot, Anti-Spam by CleanTalk, published on 5 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Spam protection, Honeypot, Anti-Spam by CleanTalk plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content aria-label Placeholder in all versions up to, and including, 6.86 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload is deliverable via unauthenticated comment submission and executes exclusively for non-logged-in visitors; if comment moderation is enabled, an approving moderator must first publish the comment before the script reaches other users.

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

## Which versions are affected by CVE-2026-77830?


## How do I fix CVE-2026-77830?

No fix has been published for CVE-2026-77830 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-77830 being exploited?

There is no known exploitation of CVE-2026-77830 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-77830 and fix it if it is affected.

What it is: CVE-2026-77830 is a high-severity cross-site scripting vulnerability in Spam protection, Honeypot, Anti-Spam by CleanTalk, published on 5 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-77830 in the wild and no public exploit code.

Affected product: Spam protection, Honeypot, Anti-Spam by CleanTalk. 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-2026-77830/ (Markdown: https://insights.sbomify.com/CVE-2026-77830/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-77830
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-77830
- OSV: https://osv.dev/vulnerability/CVE-2026-77830

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-77830/
Summaries are generated and may contain mistakes; the official description above is the record.