CVE-2017-9305 — lib/core/TikiFilter/PreventXss

lib/core/TikiFilter/PreventXss.php in Tiki Wiki CMS Groupware 16.2 allows remote attackers to bypass the XSS filter via padded zero characters, as demonstrated by an attack on tiki-batch_send_newsletter.php.

01What is this vulnerability?

lib/core/TikiFilter/PreventXss.php in Tiki Wiki CMS Groupware 16.2 allows remote attackers to bypass the XSS filter via padded zero characters, as demonstrated by an attack on tiki-batch_send_newsletter.php.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2017-05-31T04:29:00.303
• Last modified: 2026-05-13T00:24:29.033

09References

• github.com — https://github.com/tikiorg/tiki/commit/6c016e8f066d2f404b18eaa1af7fa0c7a9651ccd
• www.cdxy.me — https://www.cdxy.me/?p=763
• github.com — https://github.com/tikiorg/tiki/commit/6c016e8f066d2f404b18eaa1af7fa0c7a9651ccd
• www.cdxy.me — https://www.cdxy.me/?p=763