CVE-2026-527736.1MediumCWE-80

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

YesWiki · yeswiki

Affected: yeswiki · Exploitation: check available, not yet exploited

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.6%probability of exploitation in the next 30 days

48th percentile

050100

Higher than 48% of scored CVEs

6.1MediumCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

YesWiki is a wiki system written in PHP. From version 4.1.0 to before version 4.6.6, YesWiki's archived-revision view reflects the time GET parameter into a hidden HTML input in handlers/page/show.php without escaping. Because MySQL coerces malformed DATETIME strings, an attacker can append HTML or JavaScript to a valid archived revision timestamp, still load that archived revision, and execute arbitrary JavaScript in the victim's browser. The vulnerable form is only rendered when the victim can both read and edit the target page. In restricted deployments this requires a victim with read and write access to that page. On a default doryphore 4.6.5 install, public pages such as PagePrincipale were editable anonymously during validation, so the issue can also affect unauthenticated visitors in that configuration. This issue has been patched in version 4.6.6.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

YesWiki · yeswiki>= 4.1.0, < 4.6.6

On the Atlas

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Open the Atlas

Exploitation: Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
CISA KEV: Not listed
Public check: YesWiki Archived Revision - Cross-Site Scripting · nuclei template in projectdiscovery/nuclei-templates
Weakness: Improper Neutralization of Script-Related HTML Tags in a Web Page · Cross-site Scripting
Vendor: YesWiki
Published: September 2026
Band: Check available, not yet exploited, September 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-52773 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.