Security readout for executives and security teams
Plain-English summary
OpenReplay 1.24.0 installations can store attacker-controlled text from visitors and later show it unsafely to logged-in dashboard users. If a dashboard user views the poisoned data, attacker script can run in the dashboard context and take over that account. The issue is fixed in OpenReplay 1.25.0.
Executive priority
Prioritize remediation urgently for any exposed OpenReplay dashboard. This is a critical account-takeover path against administrators or analysts who use the dashboard, but evidence of active exploitation is not provided.
Technical view
The vulnerability is stored XSS in OpenReplay from 1.24.0 before 1.25.0. Custom event names and captured page URLs accepted through a public project key were stored without output encoding, then rendered in dashboard UI components. The advisory describes dashboard-origin script execution and JWT exposure from localStorage.
Likely exposure
Exposure is limited to self-hosted OpenReplay deployments running version 1.24.0 before 1.25.0. Systems not using OpenReplay, or already upgraded to 1.25.0, are not indicated as affected by the provided sources.
Exploitation context
The CVE is not listed as KEV, and the provided bundle does not cite active exploitation. The attack is remotely reachable and unauthenticated for data injection, but requires a logged-in dashboard user to view affected stored data.
Researcher notes
Focus validation on version exposure, stored dashboard-rendered fields, and post-upgrade encoding behavior. Do not assume affected versions beyond 1.24.0 before 1.25.0. The public record names CWE-79 and CVSS 9.3 with changed scope.
Mitigation direction
- Upgrade affected OpenReplay deployments to version 1.25.0.
- Review the GitHub advisory and v1.25.0 release notes before deployment.
- Limit dashboard access until affected instances are upgraded.
- Treat dashboard sessions active during exposure as potentially compromised.
Validation and detection
- Inventory OpenReplay deployments and confirm their running versions.
- Verify no instance remains on 1.24.0 before 1.25.0.
- Review dashboard logs for unusual account or session activity.
- Confirm stored event names and page URLs render safely after upgrade.
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-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-2026-55879 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
- Critical
- CVSS
- 9.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/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.
SSVC decision data
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:N/UI:R/S:C/C:H/I:H/A:N2.85.8GitHub_MVulnerability scoring details
Base CVSS 3.1 score
9.3CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/openreplay/openreplay/security/advisories/GHSA-3mfc-7hf4-jfxhCVE reference, GitHub_M · x_refsource_CONFIRM
- https://github.com/openreplay/openreplay/commit/ec41f4425a99c478a4418adbd2f094ab6a8b0dafCVE reference, GitHub_M · x_refsource_MISC
- https://github.com/openreplay/openreplay/releases/tag/v1.25.0CVE reference, GitHub_M · 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.