CVE-2023-40680: WordPress Yoast SEO Plugin <= 21.0 is vulnerable to Cross Site Scripting (XSS)
Modified
Published 30-11-2023Last modified 28-04-2026
Vulnerability summary
CVE-2023-40680 is a medium (CVSS 5.9) Cross-site Scripting vulnerability in team yoast yoast seo. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 35.9% of scored vulnerabilities. Fixed in 21.1.
CVSS score
5.9/10
010
Medium · v3.1 (CVE.org)EPSS score
0.43%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded
Timeline
- 30-11-2023PublishedVulnerability first disclosed.
- 28-04-2026Last modifiedVulnerability information updated.
Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Team Yoast Yoast SEO allows Stored XSS.This issue affects Yoast SEO: from n/a through 21.0.
CVSS metrics
3 scores · 3 sources · 1 versionMedium 5.9Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:LSources3 sources · 4.8–5.9
- NVDNIST4.8MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:NDiffers
- wordfenceSource5.5MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:NDiffers
EPSS trend
Probability
0.43%
Chance of exploitation in the next 30 days
Percentile
36%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.43% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Team yoast1 product
- yoast seo≥ n/a, ≤ 21.0
Wordpress1 product
- wordpress-seo≤ 21.0 (fixed in 21.1)
Yoast1 product
- yoast_seo≤ 21.0
3 vendors · 3 products