Security readout for executives and security teams
Plain-English summary
WeasyPrint before 68.0 can be tricked into fetching internal URLs during PDF generation if a blocked URL redirects to an internal target. This can expose sensitive internal services or cloud metadata when applications render attacker-controlled or untrusted HTML into PDFs.
Executive priority
Prioritize remediation for internet-facing or multi-tenant PDF generation services. The business risk is unauthorized internal data exposure, not broad system takeover, but cloud metadata or internal admin services can make impact significant.
Technical view
The issue is an SSRF protection bypass in WeasyPrint's default_url_fetcher. Developer-supplied filtering can block the original URL, but urllib follows HTTP redirects automatically and the redirected destination is not revalidated against that policy. Version 68.0 patches the issue.
Likely exposure
Exposure is most likely where WeasyPrint prior to 68.0 renders untrusted HTML, templates, or user-controlled URLs, especially in environments with access to internal services, localhost-only endpoints, or cloud metadata services.
Exploitation context
The bundle marks KEV as false, and the provided sources do not establish active exploitation. The attack requires an application path that lets an attacker influence resources fetched by WeasyPrint during PDF generation.
Researcher notes
Evidence supports CWE-918 SSRF and CWE-601 redirect behavior. The key defensive question is whether redirects are evaluated against the same allow or deny policy as the original URL. The provided evidence does not include exploit prevalence.
Mitigation direction
- Upgrade WeasyPrint to version 68.0 or later.
- Check vendor or distribution guidance for packaged WeasyPrint builds.
- Restrict PDF rendering workloads from reaching internal services where possible.
- Review custom url_fetcher logic for redirect destination validation assumptions.
Validation and detection
- Inventory applications and containers using WeasyPrint versions before 68.0.
- Identify PDF generation paths that process untrusted HTML or external resources.
- Confirm deployed packages resolve to WeasyPrint 68.0 or a patched downstream build.
- Review tests to ensure redirected destinations are revalidated by policy.
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-601: 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 lookupCWE-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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 lookupCloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-68616 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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
2 official scoresWe 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:N/S:U/C:H/I:N/A:N3.93.6GitHub_MCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6redhat-SADPVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.
- ADP timelineredhat-SADP
Made public.
- CVE publishedCVE Program
The CVE record was published.
- ADP timelineredhat-SADP
Reported to Red Hat.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2026-01-19T16:00:58.220Z: Reported to Red Hat.
- 2026-01-19T15:20:23.702Z: Made public.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-983w-rhvv-gwmvCVE reference, GitHub_M · x_refsource_CONFIRM
- https://github.com/Kozea/WeasyPrint/commit/b6a14f0f3f4ce9c0c75c1a2d73cb1c5d43f0e565CVE reference, GitHub_M · x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2025-68616CVE reference, redhat-SADP · vdb-entry, x_refsource_REDHAT
- RHBZ#2430858CVE reference, redhat-SADP · issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68616.jsonCVE reference, redhat-SADP · x_sadp-csaf-vex
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.
URL Redirection to Untrusted Site ('Open Redirect')
URL Redirection to Untrusted Site ('Open Redirect') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Server-Side Request Forgery (SSRF)
Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.