CVE-2026-29840: JiZhiCMS v2.5.6 and before contains a Stored Cross-Site Scripting (XSS) vulnerability in the release function

Q: How do I fix CVE-2026-29840?

jizhicms: upgrade to newer than 2.5.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-29840 being exploited?

CVE-2026-29840 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-29840 affect?

CVE-2026-29840 affects jizhicms. Severity is medium (CVSS 5.4). 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 recursive

Routine

MEDIUM 5.4UPGRADE

CVE-2026-29840 is a medium-severity flaw (CVSS 5.4) affecting jizhicms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 <script> tags but fails to recursively remove dangerous event handlers in other HTML tags (such as onerror in <img> tags). This allows an authenticated remote attacker to inject arbitrary web script or HTML via the body parameter in a POST reques

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-03-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jizhicms

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

Am I affected?

Timeline

2026-03-24 16:16 UTCPublished CVE record published
2026-06-17 10:29 UTCUpdated Record last modified

jizhicms jizhicms UPGRADE

Affected: <= 2.5.6

Fixed in: newer than 2.5.6

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.5.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade jizhicms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jizhicms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-29840?

jizhicms: upgrade to newer than 2.5.6. Exact commands for each OS are on this page.

Is CVE-2026-29840 being exploited?

CVE-2026-29840 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-2026-29840 affect?

CVE-2026-29840 affects jizhicms. Severity is medium (CVSS 5.4). 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 <script> tags but fails to recursive

How urgent is CVE-2026-29840?

Priority 21/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2025-50229 CRITICAL 9.8 DOWNGRADE Jizhicms v2.5.4 is vulnerable to SQL injection in the product editing module.
CVE-2025-50228 CRITICAL 9.1 DOWNGRADE Jizhicms v2.5.4 is vulnerable to Server-Side Request Forgery (SSRF) in User Evaluation, Message, and Comment m

References

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