We found 3 issueson seedream50.proworth fixing.
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How the composite score works
The overall score is a weighted average: Visual 18.75%, Accessibility 25%, Buttons and links 31.25%, Under the hood 12.5%, and Mobile 12.5%. Unassessed categories are excluded and the remaining weights are normalized.
Product categories start at 100. Each distinct verified finding deducts 30 points for a reproduced flow defect, or 18 for critical, 12 for high, 7 for medium, and 3 for low stored detector severity. Scores stop at zero and round to whole numbers. All verified findings count, including those beyond the displayed list. The formula is fixed and versioned, so the same saved evidence always receives the same score.
Key browser security headers are missing on the home page
The response from https://seedream50.pro/ is missing Content-Security-Policy, CSP frame-ancestors or X-Frame-Options, X-Content-Type-Options: nosniff, Referrer-Policy, and Cross-Origin-Resource-Policy.
Try it: Run curl -I https://seedream50.pro/ and check the response headers for Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Cross-Origin-Resource-Policy.
Guide links are hard to spot for low vision readers
Readers of the prompt guide who want to reach the model overview or the generator have to notice two inline links that are set apart only by a faint blue tint. On /prompt-guide, the links "Seedream 5.0 Pro overview" and "Seedream 5.0 Pro AI Image Generator" carry no underline and sit at 1.29:1 contrast against the surrounding body text, below the 3:1 minimum required by WCAG 1.4.1. Visitors with low vision or colour deficiency can read the paragraph and never realise there is a route onward.
Try it: Open /prompt-guide, scroll to the intro paragraph above "Quick Prompt Formula", and check that the two inline links have no underline and only a slight colour shift from the body text.
Footer disclaimer text is hard to read
Visitors who want to confirm who runs this project and whether it is affiliated with ByteDance have to read a footer line that sits below the readable contrast threshold. The footer paragraph with class .text-fg-dim renders 12px text at #64748b on a #0a0a1a background, a contrast ratio of 4.11:1 against the 4.5:1 required by WCAG 2 AA, and the same failure appears across the home page, product, guide, pricing, and policy routes. Readers with low vision or on a glare-heavy screen can miss the ownership and affiliation statement entirely.
Try it: Open the home page, scroll to the footer copyright line, and measure the small grey text (#64748b on #0a0a1a) with a contrast checker or run axe-core on the route.
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