---
title: "CVE-2025-46348: YesWiki Vulnerable to Unauthenticated Site Backup Creation and Download"
url: https://erroneo.us/security/cve/CVE-2025-46348/
description: "CVE-2025-46348 (yeswiki/yeswiki (Composer (PHP))): YesWiki is a wiki system written in PHP. Prior to version 4.5.4, the request to commence a site backup…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-04-29
date_modified: 2025-04-30
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-46348"
kev: false
cvss: 10
epss: 0.00653
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-46348: YesWiki Vulnerable to Unauthenticated Site Backup Creation and Download

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.7% , percentile 51: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 51% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes yeswiki/yeswiki (Composer (PHP)) <= 4.5.3, fixed in 4.5.4 . Check your lockfile, including transitive dependencies.

## What it is

YesWiki is a wiki system written in PHP. Prior to version 4.5.4, the request to commence a site backup can be performed and downloaded without authentication. The archives are created with a predictable filename, so a malicious user could create and download an archive without being authenticated. This could result in a malicious attacker making numerous requests to create archives and fill up the file system, or by downloading the archive which contains sensitive site information. This issue has been patched in version 4.5.4.

## Affected packages

- Composer (PHP) `yeswiki/yeswiki` <= 4.5.3 → fixed: 4.5.4

## Affected products (CVE record)

- YesWiki yeswiki: < 4.5.4

## Severity

- GitHub_M CVSS 3.1: 10 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 10.0 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.65% probability of exploitation activity in the next 30 days; percentile 51.

## Sources

- [GitHub Advisory GHSA-wc9g-6j9w-hr95](https://github.com/advisories/GHSA-wc9g-6j9w-hr95)
- [CVE.org record CVE-2025-46348](https://www.cve.org/CVERecord?id=CVE-2025-46348)
- [NVD entry CVE-2025-46348](https://nvd.nist.gov/vuln/detail/CVE-2025-46348)
- [github.com](https://github.com/YesWiki/yeswiki/security/advisories/GHSA-wc9g-6j9w-hr95)
- [github.com](https://github.com/YesWiki/yeswiki/commit/0d4efc880a727599fa4f6d7a64cc967afe475530)

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Source page: https://erroneo.us/security/cve/CVE-2025-46348/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt