Security readout for executives and security teams
Plain-English summary
CVE-2026-1298 affects the Easy Replace Image WordPress plugin through version 3.5.2. A logged-in user with Contributor or higher access could replace existing site images using external image URLs. The main business risk is unauthorized content changes, including defacement, misleading imagery, or phishing support.
Executive priority
Treat as a near-term WordPress hygiene issue, not an emergency. Prioritize sites with many content contributors, public registration workflows, or high brand sensitivity. Reduce unnecessary contributor access and apply vendor updates when available.
Technical view
The issue is missing authorization, CWE-862, in the image_replacement_from_url function exposed through the eri_from_url AJAX action. Sources report authenticated Contributor+ users can replace arbitrary image attachments. CVSS 3.1 is 4.3, reflecting low-complexity, network-reachable exploitation requiring low privileges and causing limited integrity impact.
Likely exposure
WordPress sites running Easy Replace Image 3.5.2 or earlier are potentially exposed, especially where Contributor-level accounts are broadly assigned or untrusted. Sites without the plugin, or without authenticated low-privilege users, have lower practical exposure.
Exploitation context
The source bundle does not show CISA KEV listing or other cited evidence of active exploitation. Exploitation requires a valid authenticated account with Contributor-level access or higher, but does not require user interaction once that access exists.
Researcher notes
Evidence indicates an authorization gap on an AJAX handler rather than unauthenticated compromise. Impact is limited to integrity of image attachments. The bundle references WordPress Trac code and a changeset, but does not clearly name a fixed plugin version.
Mitigation direction
- Check whether Easy Replace Image is installed and identify its version.
- If version is 3.5.2 or earlier, check vendor guidance and update when a fixed release is available.
- Limit Contributor and higher roles to trusted users only.
- Remove unused or unnecessary WordPress accounts.
- Monitor media library changes for unexpected image replacements.
Validation and detection
- Inventory WordPress sites for the Easy Replace Image plugin.
- Confirm whether installed versions are 3.5.2 or earlier.
- Review users assigned Contributor, Author, Editor, or Administrator roles.
- Review logs for unusual admin-ajax.php activity involving eri_from_url.
- Inspect recent media attachment changes for unauthorized replacements.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2026-1298 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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:U/C:N/I:L/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/27332c13-c25f-47ec-980d-035fc35ce553?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/easy-replace-image/trunk/easy-replace-image.php#L961CVE reference
- https://plugins.trac.wordpress.org/browser/easy-replace-image/tags/3.5.2/easy-replace-image.php#L961CVE reference
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3447984%40easy-replace-image&new=3447984%40easy-replace-image&sfp_email=&sfph_mail=CVE reference
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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.