CVE-2026-52773: YesWiki Vulnerable to Reflected XSS via Unescaped Archived-Revision `time` Parameter in `handlers/page/show.php`

medium Affects yeswiki/yeswiki. Feed 2026.10.29.1, updated 2026-10-28; published 2026-07-09.

YesWiki Vulnerable to Reflected XSS via Unescaped Archived-Revision `time` Parameter in `handlers/page/show.php`

Package: yeswiki/yeswiki Composer
Affected versions: >=4.1.0 and <4.6.6
Fixed in: 4.6.6
Severity: medium CVSS 6.1
Exploitation: not on CISA KEV · EPSS 1% (48.1th percentile)
Published: 2026-07-09
Source: osv.dev

References

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden deps composer.lock

# or, without Composer
pipx install phpwarden   &&   phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

Install docs How findings are ranked

Related advisories

CVE-2025-31131 high Yeswiki Path Traversal vulnerability allows arbitrary read of files same package: yeswiki/yeswiki
CVE-2026-46670 critical YesWiki: Unauthenticated SQL Injection same package: yeswiki/yeswiki
CVE-2021-43091 high SQL Injection in Yeswiki same package: yeswiki/yeswiki
CVE-2025-46347 high YesWiki Remote Code Execution via Arbitrary PHP File Write and Execution same package: yeswiki/yeswiki
CVE-2026-52778 critical YesWiki has Unsafe eval() in its Formula Calculato, Leading to Remote Code Execution & Den same package: yeswiki/yeswiki
CVE-2026-52762 high YesWiki: Authenticated (Admin) Server-Side Template Injection to Remote Code Execution via same package: yeswiki/yeswiki