CVE-2025-34045: A path traversal vulnerability exists in WeiPHP 5.0, an open source WeChat public account platform development

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2025-34045 is a high-severity flaw (CVSS 7.5) affecting weiphp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A path traversal vulnerability exists in WeiPHP 5.0, an open source WeChat public account platform development framework by Shenzhen Yuanmengyun Technology Co., Ltd. The flaw occurs in the picUrl parameter of the /public/index.php/material/Material/_download_imgage endpoint, where insufficient input validation allows unauthenticated remote attackers to perform directory traversal via crafted POST requests. This enables arbitrary file read on the

Why this priority

High severity
EPSS top 9%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.2% (top 9%)
CISA exploited list	No
Weakness	CWE-22
Published	2025-06-26
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: weiphp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-06-26 16:15 UTCPublished CVE record published
2026-06-17 09:13 UTCUpdated Record last modified

weiphp weiphp DOWNGRADE

Affected: 5.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0

1. Check installed version

apt-cache policy weiphp || rpm -q weiphp || weiphp --version

2. No fixed release: DOWNGRADE to a release before 5.0 (Debian / Ubuntu)

apt-cache madison weiphp sudo apt install weiphp=<VERSION_BEFORE_5.0> sudo apt-mark hold weiphp

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list weiphp sudo dnf downgrade weiphp-<VERSION_BEFORE_5.0> sudo dnf versionlock add weiphp

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: WeiPHP 5.0 - Path Traversal

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-34045?

weiphp: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-34045 being exploited?

CVE-2025-34045 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-34045 affect?

CVE-2025-34045 affects weiphp. Severity is high (CVSS 7.5). A path traversal vulnerability exists in WeiPHP 5.0, an open source WeChat public account platform development framework by Shenzhen Yuanmengyun Technology Co., Ltd. The flaw occurs in the picUrl parameter of the /public/index.php/material/

How urgent is CVE-2025-34045?

Priority 59/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2025-55849 HIGH 8.4 UPGRADE WeiPHP v5.0 and before is vulnerable to SQL Injection via the SucaiController.class.php file and the cancelTem

References

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