CVE-2026-82884: All in One SEO < 5.0.0.1 - Contributor+ Stored XSS via ai-assistant Block
Vulnerability summary
CVE-2026-82884 is a medium (CVSS 6.8) Cross-site Scripting vulnerability in unknown all in one seo. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 36.2% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 5.0.0.1.
Timeline
- 02-09-2026PublishedVulnerability first disclosed.
- 02-09-2026Last modifiedVulnerability information updated.
Description
The All in One SEO WordPress plugin before 5.0.0.1 does not sanitise and escape some content stored in posts before rendering it back in the post editor, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks that trigger when a higher privileged user edits the post.
CVSS metrics
3 scores · 3 sources · 1 version- NVDNIST6.8MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
- wordfenceSource6.4MediumCVSS:3.1/AV:N/AC:L/PR:L/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
Increase +0.20 pp
From 0.24% on 22-09-2026
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
1 foundExploit Reference (wpscan.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Unknown1 product
- all in one seo< 5.0.0.1
Wordpress1 product
- all-in-one-seo-pack≤ 5.0.0.0 (fixed in 5.0.0.1)
2 vendors · 2 products