# CVE-2026-100311: mathurvishal CloudClassroom-PHP-Project Faculty Video Management managevideos2.php cross site scripting

> Remote attackers can inject malicious scripts via video management fields in CloudClassroom-PHP-Project, potentially leading to session hijacking or code execution.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **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:** 26 Sep 2026
- **Updated:** 28 Sep 2026
- **Also known as:** GHSA-jm43-phf9-333q

## What is CVE-2026-100311?

CVE-2026-100311 is a medium-severity cross-site scripting vulnerability in mathurvishal CloudClassroom-PHP-Project, published on 26 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A vulnerability was identified in mathurvishal CloudClassroom-PHP-Project up to 5dadec098bfbbf3300d60c3494db3fb95b66e7be. The affected element is an unknown function of the file managevideos2.php of the component Faculty Video Management. Such manipulation of the argument V_Title/V_Url/V_Remarks leads to cross site scripting. The attack may be performed from remote. The exploit is publicly available and might be used. This product utilizes a rolling release system for continuous delivery, and as such, version information for affected or updated releases is not disclosed. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-100311?


## How do I fix CVE-2026-100311?

No fix has been published for CVE-2026-100311 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-100311 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100311 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-100311 and fix it if it is affected.

What it is: CVE-2026-100311 is a medium-severity cross-site scripting vulnerability in mathurvishal CloudClassroom-PHP-Project, published on 26 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100311 exists.

Affected product: mathurvishal CloudClassroom-PHP-Project. 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-2026-100311/ (Markdown: https://insights.sbomify.com/CVE-2026-100311/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-100311
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-100311
- OSV: https://osv.dev/vulnerability/CVE-2026-100311

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-100311/
Summaries are generated and may contain mistakes; the official description above is the record.