# CVE-2023-26491: RSSHub is vulnerable to cross-site scripting (XSS) via unvalidated URL parameters

> Attackers can execute arbitrary JavaScript in victims' browsers via malicious URL parameters in RSSHub, requiring an upgrade to fix.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 3 Mar 2023
- **Updated:** 25 Feb 2025
- **Also known as:** GHSA-32gr-4cq6-5w5q

## What is CVE-2023-26491?

CVE-2023-26491 is a medium-severity cross-site scripting vulnerability in DIYgod RSSHub, published on 3 Mar 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

RSSHub is an open source and extensible RSS feed generator. When the URL parameters contain certain special characters, it returns an error page that does not properly handle XSS vulnerabilities, allowing for the execution of arbitrary JavaScript code. Users who access the deliberately constructed URL are affected. This vulnerability was fixed in version c910c4d28717fb860fbe064736641f379fab2c91. Please upgrade to this or a later version, there are no known workarounds.

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

## Which versions are affected by CVE-2023-26491?

2 open source packages ship an affected version, including rsshub. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `rsshub` | npm | All versions | 1.0.0-master.c910c4d |
| `rsshub` | npm | All versions | 1.0.0-master.c910c4d |

Products: Rsshub Rsshub.

## How do I fix CVE-2023-26491?

Upgrade rsshub to 1.0.0-master.c910c4d or later.

## Is CVE-2023-26491 being exploited?

There is no known exploitation of CVE-2023-26491 in the wild and no public exploit code.

## Other vulnerabilities in DIYgod RSSHub

- [CVE-2023-22493](https://insights.sbomify.com/CVE-2023-22493/): RSSHub is vulnerable to SSRF (Server-Side Request Forgery) (high 8.8)
- [CVE-2021-21278](https://insights.sbomify.com/CVE-2021-21278/): Risk of code injection in RSSHub (high 8.6)
- [CVE-2024-27927](https://insights.sbomify.com/CVE-2024-27927/): RSSHub vulnerable to SSRF in /mastodon, /zjoi, and /m4 (medium 6.5)
- [CVE-2024-27926](https://insights.sbomify.com/CVE-2024-27926/): RSSHub Cross-site Scripting vulnerability caused by internal media proxy (medium 6.1)
- [CVE-2022-31110](https://insights.sbomify.com/CVE-2022-31110/): Denial of Service (DoS) vulnerability in RSSHub (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-26491 and fix it if it is affected.

What it is: CVE-2023-26491 is a medium-severity cross-site scripting vulnerability in DIYgod RSSHub, published on 3 Mar 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-26491 in the wild and no public exploit code.

Affected packages and fixed versions:
- rsshub (npm): affected all versions; fixed in 1.0.0-master.c910c4d
- rsshub (npm): affected all versions; fixed in 1.0.0-master.c910c4d

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-2023-26491/ (Markdown: https://insights.sbomify.com/CVE-2023-26491/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-26491
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-26491
- OSV: https://osv.dev/vulnerability/CVE-2023-26491

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-26491/
Summaries are generated and may contain mistakes; the official description above is the record.