VulnerabilityModified
CVE-2021-36830
Authenticated (admin+) Stored Cross-Site Scripting (XSS) vulnerability in Comment Guestbook plugin <= 0.8.0 at WordPress.
MEDIUM 4.8EPSS 0.51%
Does this matter?
Lower severity and a low EPSS score (0.51%). Track it; it rarely justifies an emergency change on its own.
Description
Authenticated (admin+) Stored Cross-Site Scripting (XSS) vulnerability in Comment Guestbook plugin <= 0.8.0 at WordPress.
- CVSS 3.1
- 4.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.51% probability · 43th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- comment guestbook project/comment guestbook
- Source
- audit@patchstack.com
EPSS 0.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://patchstack.com/database/vulnerability/comment-guestbook/wordpress-comment-guestbook-plugin-0-8-0-authenticated-stored-cross-site-scripting-xss-vulnerability?_s_id=cveThird Party Advisory
- https://wordpress.org/plugins/comment-guestbook/Product
- https://patchstack.com/database/vulnerability/comment-guestbook/wordpress-comment-guestbook-plugin-0-8-0-authenticated-stored-cross-site-scripting-xss-vulnerability?_s_id=cveThird Party Advisory
- https://wordpress.org/plugins/comment-guestbook/Product
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.