CVE-2018-18678 — GNUBOARD5 before 5

GNUBOARD5 before 5.3.2.0 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "board group extra contents" parameter, aka the adm/boardgroup_form_update.php gr_1~10 parameter.

01What is this vulnerability?

GNUBOARD5 before 5.3.2.0 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "board group extra contents" parameter, aka the adm/boardgroup_form_update.php gr_1~10 parameter.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

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: 2019-10-30T17:58:11.000Z
• Last modified: 2024-08-05T11:16:00.429Z

09References

• github.com — https://github.com/gnuboard/gnuboard5/releases/tag/5.3.2.0
• github.com — https://github.com/gnuboard/gnuboard5/compare/15b2e73...2549172
• github.com — https://github.com/gnuboard/gnuboard5/commit/a45241f4bc46aee1ab2cc0749f6444b0436…