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Vulnerabilities

Vulnerability · CVE-2026-29840

JiZhiCMS v2.5.6 and before contains a Stored Cross-Site Scripting (XSS) vulnerability in the release function within app/home/c/UserController.php.

Published Mar 24, 2026 · catalog updated Jun 17, 2026 · JiZhiCMS v2.5.6 and before

Check if you run it

No confirmed exploitation is on record for CVE-2026-29840. EPSS is 0.28%. Act only if a listed version of JiZhiCMS v2.5.6 and before is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (JiZhiCMS v2.5.6 and before).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.28%
Remediation
Advisory link
Affected products
cpe jizhicms/jizhicms

JiZhiCMS v2.5.6 and before contains a Stored Cross-Site Scripting (XSS) vulnerability in the release function within app/home/c/UserController.php. The application attempts to sanitize input by filtering tags but fails to recursively remove dangerous event handlers in other HTML tags (such as onerror in tags). This allows an authenticated remote attacker to inject arbitrary web script or HTML via the body parameter in a POST request to /user/release.html.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe jizhicms/jizhicmsversion unspecified

How to fix CVE-2026-29840

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-29840. EPSS is 0.28%. Act only if a listed version of JiZhiCMS v2.5.6 and before is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 0.28%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 24, 2026 · NIST NVD

    Detected

    JiZhiCMS v2.5.6 and before contains a Stored Cross-Site Scripting (XSS) vulnerability in the release function within app/home/c/UserController.php. The application attempts to sanitize input by filtering tags but fails to recursively remove dangerous event handlers in other HTML tags (such as onerror in tags). This allows an authenticated remote attacker to inject arbitrary web script or HTML via

  2. Jun 17, 2026 · NIST NVD

    Updated

    JiZhiCMS v2.5.6 and before contains a Stored Cross-Site Scripting (XSS) vulnerability in the release function within app/home/c/UserController.php. The application attempts to sanitize input by filtering tags but fails to recursively remove dangerous event handlers in other HTML tags (such as onerror in tags). This allows an authenticated remote attacker to inject arbitrary web script or HTML via

Sources

  • CVE.orgVulnerability recordCVE-2026-29840

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-29840

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-29840

    JiZhiCMS v2.5.6 and before contains a Stored Cross-Site Scripting (XSS) vulnerability in the release function within app/home/c/UserController.php. The application attempts to sanitize input by filtering tags but fails to recursively remove dangerous event handlers in ot

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.