Security readout for executives and security teams
Plain-English summary
CVE-2021-34641 affects the SEOPress WordPress plugin versions 5.0.0 through 5.0.3. An authenticated user could store malicious script through SEO title or description metadata handling. Business risk is moderate: impact depends on who can log in and manage affected content, but successful abuse can affect site integrity and user trust.
Executive priority
Handle in the normal vulnerability remediation cycle, faster for public WordPress sites with many authenticated users. This is not evidenced as actively exploited, but it can affect site integrity and visitor trust if abused.
Technical view
The vulnerability is stored cross-site scripting in SEOPress processPut within src/Actions/Api/TitleDescriptionMeta.php. The CVSS 3.1 score is 6.4, with low attack complexity, low privileges required, changed scope, and limited confidentiality and integrity impact. Sources identify 5.0.4 as the patched code reference.
Likely exposure
Exposure is limited to WordPress sites running SEOPress 5.0.0, 5.0.1, 5.0.2, or 5.0.3 with authenticated users able to reach the affected metadata API path.
Exploitation context
The provided sources do not show active exploitation, and this CVE is not marked KEV. Abuse requires authenticated access, so risk is highest on sites with many contributors, weak account controls, or untrusted low-privilege users.
Researcher notes
Evidence is clear on affected versions, vulnerability class, location, and patched reference. The bundle does not provide proof-of-concept details, confirmed exploitation, or broader plugin configuration prerequisites beyond authenticated access.
Mitigation direction
- Upgrade SEOPress to version 5.0.4 or later.
- Restrict WordPress accounts that can edit SEO metadata.
- Review untrusted contributor, author, and editor accounts.
- Check vendor guidance for any additional cleanup instructions.
- Audit affected pages for suspicious title or description metadata.
Validation and detection
- Inventory WordPress sites using the SEOPress plugin.
- Confirm installed SEOPress versions are not 5.0.0 through 5.0.3.
- Review WordPress users with content or SEO metadata permissions.
- Inspect SEO title and description fields for unexpected scripts.
- Confirm monitoring covers suspicious admin or content changes.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-34641 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N3.12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/blog/2021/08/xss-vulnerability-patched-in-seopress-affects-100000-sites/CVE reference · x_refsource_MISC
- https://plugins.trac.wordpress.org/browser/wp-seopress/tags/5.0.4/src/Actions/Api/TitleDescriptionMeta.php#L78CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.